diff --git a/field-tags.php b/field-tags.php
new file mode 100644
index 0000000..146f0b4
--- /dev/null
+++ b/field-tags.php
@@ -0,0 +1,127 @@
+<?php
+function scholarpress_coins__author_fields( $data, $locked ) {
+    $authors = array();
+    $legacy_author = array();
+    if ( ! is_array( $data['_coins-author-first'] ) ) {
+        $legacy_author['first'] = $data['_coins-author-first'];
+        if ( $data['_coins-author-last'] ) 
+            $legacy_author['last'] = $data['_coins-author-last'];
+        array_push($authors, $legacy_author);
+    } else {
+        foreach( $data['_coins-author-first'] as $index => $author_first ) {
+            array_push($authors,
+                array(
+                    'first' => $author_first,
+                    'last' => $data['_coins-author-last'][$index],
+                )
+            );
+        }
+    }
+	?>
+    <div class="scholarpress-field__input">
+	<fieldset <?php if ( $locked ) echo 'disabled'; ?> id="coins-author">
+		<legend>Authors</legend>
+		<?php
+	    foreach ( $authors as $index => $author ) {
+	    	scholarpress_coins__single_author_fieldset( $author, $index );
+	    }
+	    ?>
+    </fieldset>
+
+    <button id="coins-add-author" class="add_author_button" <?php if ( $locked ) echo 'disabled'; ?>>Add author</button>
+    </div>
+
+    <div class="scholarpress-field__lock">
+        <input
+            id="coins-author-lock"
+            name="_coins-author-lock"
+            type="checkbox"
+            <?php if ( $locked ) echo ' checked'; ?>
+        >
+        <label for="coins-author-lock">
+            <?php _e( 'Lock fields to post author?', 'scholarpress-coins' ); ?>
+        </label>
+    </div>
+    <?php
+    global $post;
+    $default_author_data = get_userdata( $post->post_author );
+    $default_author_first = $default_author_data->first_name;
+    $default_author_last = $default_author_data->last_name;
+    
+    if ( ! ($default_author_last && $default_author_first ) ) {
+        $default_author_first = $default_author_data->display_name;
+        $default_author_last = '';
+    }
+    ?>
+    <input type="hidden" class="coins-author-first-hidden" value="<?php echo esc_attr( $default_author_first ); ?>">
+    <input type="hidden" class="coins-author-last-hidden" value="<?php echo esc_attr( $default_author_last ); ?>">
+
+    <?php
+}
+
+function scholarpress_coins__single_author_fieldset( $author, $field_id_index ) {
+?>
+    <fieldset class="coins_single_author">
+    	<label>
+    		<?php _e( 'First name:', 'scholarpress-coins' ); ?>
+        	<input
+        		class="widefat"
+        		<?php if ( $field_id_index === 0 ) : ?>
+                    id="coins-author-first-primary"
+        		<?php endif; ?>
+                name="_coins-author-first[]"
+        		type="text"
+        		value="<?php echo esc_attr( $author['first'] ); ?>"
+        	>
+        </label>
+       	<label>
+    		<?php _e( 'Last name:', 'scholarpress-coins' ); ?>
+            <input
+                class="widefat"
+                <?php if ( $field_id_index === 0 ) : ?>
+                    id="coins-author-last-primary"
+                <?php endif; ?>
+                name="_coins-author-last[]"
+                type="text"
+                <?php if ( isset( $author['last'] ) ) : ?>
+                    value="<?php echo esc_attr( $author['last'] ); ?>"
+                <?php endif; ?>
+            >
+    	</label>
+    </fieldset>
+<?php
+}
+
+function scholarpress_coins__input_field( $field, $title, $value, $locked ) {
+?>
+    <div class="scholarpress-field__input">
+        <label for="<?php echo esc_attr( 'coins-' . $field ); ?>">
+            <?php echo esc_attr( $title ); ?></label>
+        <input
+            class="widefat"
+            id="<?php echo esc_attr( 'coins-' . $field ); ?>"
+            name="<?php echo esc_attr( '_coins-' . $field ); ?>"
+            type="text"
+            value="<?php echo esc_attr( $value ); ?>"
+            <?php if ( $locked ) echo ' disabled'; ?>
+        >
+        </input>
+    </div>
+<?php
+}
+
+function scholarpress_coins__field_lock( $field, $locked, $label_text ) {
+?>
+    <div class="scholarpress-field__lock">
+        <input
+            id="coins-<?php echo esc_attr( $field ); ?>-lock"
+            name="_coins-<?php echo esc_attr( $field ); ?>-lock"
+            type="checkbox"'
+            <?php if ( $locked ) echo ' checked'; ?>
+        >
+        <label for="coins-<?php echo esc_attr( $field ); ?>-lock"><?php echo esc_html( $label_text ); ?></label>
+    </div>
+<?php
+}
+
+?>
\ No newline at end of file
diff --git a/functions.php b/functions.php
index d732280..deea322 100755
--- a/functions.php
+++ b/functions.php
@@ -1,5 +1,10 @@
 <?php
 
+function scholarpress_coins__enqueue_assets() {
+    wp_enqueue_script( 'scholarpress-coins', plugins_url( '/js/scholarpress-coins.js', __FILE__ ), array(), '2.1', true );
+    wp_enqueue_style( 'scholarpress-coins', plugins_url( 'scholarpress-coins.css', __FILE__ ) );
+}
+
 function scholarpress_coins_keys() {
     return array(
         '_coins-title',
@@ -14,7 +19,6 @@ function scholarpress_coins_keys() {
 function scholarpress_coins_prepare_data_for_display( $post_id ) {
     if( empty( $post_id ) )
         return false;
-
     $legacy_data = scholarpress_coins_get_legacy_post_data();
     $return_data = array();
 
@@ -35,6 +39,7 @@ function scholarpress_coins_prepare_data_for_display( $post_id ) {
         }
     }
     return $return_data;
+
 }
 function scholarpress_coins_get_legacy_post_data( $post_id = null ) {
     global $post, $authordata;
diff --git a/js/scholarpress-coins.js b/js/scholarpress-coins.js
index 490d86e..fef6b3b 100755
--- a/js/scholarpress-coins.js
+++ b/js/scholarpress-coins.js
@@ -1,29 +1,112 @@
-jQuery( document ).ready( function() {
-	var coins_metabox = document.getElementById( 'scholarpress-coins-meta-box' );
-	if ( coins_metabox === null ) {
+jQuery(document).ready(function() {
+	var coins_metabox = document.getElementById('scholarpress-coins-meta-box');
+	if (coins_metabox === null) {
 		return false;
 	}
-	var fields_to_lock = ['title', 'author-first', 'subjects', 'identifier'];
-	fields_to_lock.forEach( function( field ) {
-		var field_lock_id = 'coins-' + field + '-lock';
-		document.getElementById( field_lock_id ).addEventListener( 'click', function( e ) {
-			var field_id = e.target.id.replace('-lock', '');
-			var field = document.getElementById( field_id );
-			if ( this.checked ) {
-				field.disabled = true;
-				field.value = document.getElementsByClassName(field_id + '-hidden')[0].value;
-				if ( field_id == 'coins-author-first' ) {
-					var last_name_field = document.getElementById( 'coins-author-last' );
-					last_name_field.disabled = true;
+	var add_author_button = document.getElementById('coins-add-author');
+	add_author_button.addEventListener('click', coins_add_author);
+
+	var author_fieldsets = document.getElementsByClassName( "coins_single_author" );
+	for ( var i = 1; i < author_fieldsets.length; i++ ) {
+		add_remove_button( author_fieldsets[i] );
+	}
+
+	var locking_field_names = ['title', 'author', 'subjects', 'identifier'];
+	locking_field_names.forEach( function(field) {
+		var locking_field_checkbox = document.getElementById('coins-' + field + '-lock');
+		if(!locking_field_checkbox) {
+			return;
+		}
+		locking_field_checkbox.addEventListener('click', function(e) {
+			var locking_field_id = e.target.id.replace('-lock', '');
+			var locking_field = document.getElementById( locking_field_id );
+
+			if (this.checked) {
+				locking_field.disabled = true;
+				if ( locking_field_id == 'coins-author' ) {
+					for (var i = 1; i < author_fieldsets.length; i++) {
+						author_fieldsets[i].remove();
+					}
+					document.getElementById('coins-add-author').disabled = true;
+					var first_name_field = document.getElementById('coins-author-first-primary');
+					var last_name_field = document.getElementById('coins-author-last-primary');
+					first_name_field.value = document.getElementsByClassName( 'coins-author-first-hidden' )[0].value;
 					last_name_field.value = document.getElementsByClassName( 'coins-author-last-hidden' )[0].value;
+				} else {
+					locking_field.value = document.getElementsByClassName(locking_field_id + '-hidden')[0].value;
 				}
 			} else {
-				field.disabled = false;
-				if ( field_id == 'coins-author-first' ) {
-					document.getElementById( 'coins-author-last' ).disabled = false;
+				locking_field.disabled = false;
+				if (locking_field_id == 'coins-author') {
+					document.getElementById('coins-add-author').disabled = false;
 				}
 			}
 
 		} );
 	} );
-});
\ No newline at end of file
+
+
+});
+
+function coins_add_author( event ) {
+	event.preventDefault();
+	add_author_fieldset();
+}
+
+function add_author_fieldset() {
+	var new_fieldset = document.createElement("fieldset");
+
+	// First Name label and field
+	var first_name_label = document.createElement("label");
+	var first_name_label_text = document.createTextNode("First name:");
+	first_name_label.appendChild(first_name_label_text);
+
+	var first_name_field = document.createElement("input");
+	first_name_field.setAttribute("name", "_coins-author-first[]");
+	first_name_field.setAttribute("type", "text");
+	first_name_field.classList.add("widefat");
+	first_name_label.appendChild(first_name_field);
+
+	new_fieldset.appendChild(first_name_label);
+
+	// Last Name label and field
+	var last_name_label = document.createElement("label");
+	var last_name_label_text = document.createTextNode("Last name:");
+	last_name_label.appendChild(last_name_label_text);
+
+	var last_name_field = document.createElement("input");
+	last_name_field.setAttribute("name", "_coins-author-last[]");
+	last_name_field.setAttribute("type", "text");
+	last_name_field.classList.add("widefat");
+	last_name_label.appendChild(last_name_field);
+
+	new_fieldset.appendChild(last_name_label);
+
+	// Remove button
+	var remove_button = document.createElement("button");
+	remove_button.classList.add("remove_author_button");
+	var remove_button_text = document.createTextNode('Remove author');
+	remove_button.appendChild(remove_button_text);
+	remove_button.addEventListener('click', remove_button_parent);
+	new_fieldset.appendChild(remove_button);
+
+	var author_fieldset = document.getElementById('coins-author');
+	new_fieldset.classList.add("coins_single_author");
+	author_fieldset.appendChild(new_fieldset);
+}
+
+function add_remove_button( author_fieldset ) {
+	console.log( author_fieldset );
+
+	var remove_button = document.createElement("button");
+	remove_button.classList.add("remove_author_button");
+	var remove_button_text = document.createTextNode('Remove author');
+	remove_button.appendChild(remove_button_text);
+	remove_button.addEventListener('click', remove_button_parent);
+	author_fieldset.appendChild(remove_button);
+}
+
+function remove_button_parent( event ) {
+	event.preventDefault();
+	this.parentNode.remove();
+}
\ No newline at end of file
diff --git a/scholarpress-coins.css b/scholarpress-coins.css
new file mode 100644
index 0000000..7852b20
--- /dev/null
+++ b/scholarpress-coins.css
@@ -0,0 +1,20 @@
+.scholarpress-field {
+	margin-bottom: 1rem;
+}
+.scholarpress-field__input + .scholarpress-field__lock {
+	margin-top:  .5rem;
+}
+
+.coins_single_author {
+	padding: .5rem 0;
+}
+.coins_single_author:first-of-type {
+	padding-top: 0;
+}
+.coins_single_author:not(:last-child) {
+	border-bottom: .1rem solid lightgray;
+}
+.remove_author_button,
+.add_author_button {
+	margin-top: .25rem;
+}
\ No newline at end of file
diff --git a/scholarpress-coins.php b/scholarpress-coins.php
index df38053..87e7205 100755
--- a/scholarpress-coins.php
+++ b/scholarpress-coins.php
@@ -25,7 +25,7 @@
 
 add_action( 'init', 'scholarpress_coins_init' );
 function scholarpress_coins_init() {
-    include_once( 'functions.php' );
+    require_once( 'functions.php' );
     load_plugin_textdomain( 'scholarpress-coins', false, dirname( plugin_basename( __FILE__ ) ) . '/languages' );
 }
 
@@ -41,8 +41,9 @@ function scholarpress_coins_add_coins_meta_box() {
     );
 }
 function scholarpress_coins_show_meta_box( $post ) {
-    wp_enqueue_script( 'scholarpress-coins', plugins_url( '/js/scholarpress-coins.js', __FILE__ ), array(), '2.0', true );
-
+    // Get set up
+    require_once( 'field-tags.php' );
+    scholarpress_coins__enqueue_assets();
     $metabox_display_data = scholarpress_coins_prepare_data_for_display( $post->ID );
     $locked_fields = scholarpress_coins_get_locked_fields();
     if ( empty( $metabox_display_data ) || ! is_array( $metabox_display_data ) ) {
@@ -50,123 +51,145 @@ function scholarpress_coins_show_meta_box( $post ) {
         return;
     }
 
-    // Post Title field
-    echo '<label for="coins-title">' . __( 'Title:', 'scholarpress-coins' ) . '</label>';
-    echo '<input class="widefat" id="coins-title" name="_coins-title" type="text" value="' . esc_attr( $metabox_display_data['_coins-title'] ) . '"'; 
-    if ( in_array( '_coins-title', $locked_fields ) ) {
-        echo ' disabled';
-    }
-    echo '>';
-    echo '<input id="coins-title-lock" name="_coins-title-lock" type="checkbox"';
-    if ( in_array( '_coins-title', $locked_fields ) ) {
-        echo ' checked';
-    }
-    echo '>';
-    echo '<label for="coins-title-lock">' . __( 'Lock field to post title?', 'scholarpress-coins' ) . '</label><br><br>';
-    echo '<input type="hidden" class="coins-title-hidden" value="' . esc_attr( $post->post_title ) . '">';
+    // Title Field
+    ?>
+    <div class="scholarpress-field">
+    <?php
+    scholarpress_coins__input_field(
+        'title',
+        __( 'Title:', 'scholarpress-coins' ),
+        $metabox_display_data['_coins-title'],
+        in_array( '_coins-title', $locked_fields )
+    );
 
+    scholarpress_coins__field_lock(
+        'title',
+        in_array( '_coins-title', $locked_fields ),
+        __( 'Lock field to post title?', 'scholarpress-coins' )
+    ); 
+    ?>
+    <input
+        type="hidden"
+        class="coins-title-hidden"
+        value="<?php echo esc_attr( $post->post_title ); ?>"
+    >
+    </div>
 
+    <?php
     // Author Name fields
-    echo '<label for="coins-author-first">' . __( 'Author/Creator\'s first or given name:', 'scholarpress-coins' ) . ' </label><input class="widefat" id="coins-author-first" name="_coins-author-first" type="text" value="' . esc_attr( $metabox_display_data['_coins-author-first'] ) . '"';
-    if ( in_array( '_coins-author-first', $locked_fields ) ) {
-        echo ' disabled';
-    }
-    echo '>';
-    echo '<label for="coins-author-last">' . __( 'Author/Creator\'s last or family name (if applicable):', 'scholarpress-coins' ) . ' </label><input class="widefat" id="coins-author-last" name="_coins-author-last" type="text" value="' . esc_attr( $metabox_display_data['_coins-author-last'] ) . '"';
-    if ( in_array( '_coins-author-first', $locked_fields ) ) {
-        echo ' disabled';
-    }
-    echo '>';
-    echo '<input id="coins-author-first-lock" name="_coins-author-first-lock" type="checkbox"';
-    if ( in_array( '_coins-author-first', $locked_fields ) ) {
-        echo ' checked';
-    }
-    echo '>';
-    echo '<label for="coins-author-first-lock">' . __( 'Lock fields to post author?', 'scholarpress-coins' ) . '</label><br><br>';
-    $authordata = get_userdata( $post->post_author );
-    $authorFirst = $authordata->first_name;
-    $authorLast = $authordata->last_name;
-    if ( empty( $authorLast ) || empty( $authorFirst ) ) {
-        $authorFirst = $authordata->display_name;
-    }
-    echo '<input type="hidden" class="coins-author-first-hidden" value="' . esc_attr( $authorFirst ) . '">';
-    echo '<input type="hidden" class="coins-author-last-hidden" value="' . esc_attr( $authorLast ) . '">'; 
-
+    ?>
+    <div class="scholarpress-field">
+    <?php
+    $author_fields_locked = in_array( '_coins-author-first', $locked_fields );
+    scholarpress_coins__author_fields( $metabox_display_data, $author_fields_locked );
+    ?>
+    </div>
 
+    <?php
     // Subjects field
     if ( ! empty( $metabox_display_data['_coins-subjects'] ) && is_array( $metabox_display_data['_coins-subjects'] ) ) {
         $metabox_display_data['_coins-subjects'] = implode( ', ', $metabox_display_data['_coins-subjects'] );
     } else {
         $metabox_display_data['_coins-subjects'] = '';
     }
-    echo '<label for="coins-subjects">' . __( 'Comma-separated list of subjects:', 'scholarpress-coins' ) . ' </label>';
-    echo '<input class="widefat" id="coins-subjects" name="_coins-subjects" type="text" value="' . esc_attr( $metabox_display_data['_coins-subjects'] ) . '"';
-    if ( in_array( '_coins-subjects', $locked_fields ) ) {
-        echo ' disabled';
-    }
-    echo '>';
-    echo '<input id="coins-subjects-lock" name="_coins-subjects-lock" type="checkbox"';
-    if ( in_array( '_coins-subjects', $locked_fields ) ) {
-        echo ' checked';
-    }
-    echo '>';
-    echo '<label for="coins-subjects-lock">' . __( 'Lock field to post categories?', 'scholarpress-coins' ) . '</label><br><br>';
+    ?>
+    <div class="scholarpress-field">
+    <?php
+    scholarpress_coins__input_field(
+        'subjects',
+        __( 'Subjects:', 'scholarpress-coins' ),
+        $metabox_display_data['_coins-subjects'],
+        in_array( '_coins-subjects', $locked_fields )
+    );
+    scholarpress_coins__field_lock(
+        'subjects',
+        in_array( '_coins-subjects', $locked_fields ),
+        __( 'Lock field to post categories?', 'scholarpress-coins' )
+    );
     $subjects_string = '';
     if ( get_the_category() ) {
         $cats = get_the_category( $post->ID );
         $subjects = array();
         foreach( $cats as $cat ) {
-            $subjects[] = $cat->cat_name;
+           $subjects[] = $cat->cat_name;
         }
         $subjects_string = implode( ', ', $subjects);
     }
-    echo '<input type="hidden" class="coins-subjects-hidden" value="' . esc_attr( $subjects_string ) . '">';
+    ?>
+    <input type="hidden" class="coins-subjects-hidden" value="<?php echo esc_attr( $subjects_string ) ?>">
+    </div>
 
+    <?php
     // Other fields
-    echo '<label for="coins-source">' . __( 'Source (Website/Publication Title):', 'scholarpress-coins' ) . ' </label>';
-    echo '<input class="widefat" id="coins-source" name="_coins-source" type="text" value="' . esc_attr( $metabox_display_data['_coins-source'] ) . '"><br><br>';
-    
-    echo '<label for="coins-date">' . __( 'Date:', 'scholarpress-coins' ) . ' </label>';
-    echo '<input class="widefat" id="coins-date" name="_coins-date" type="text" value="' . esc_attr( $metabox_display_data['_coins-date'] ) . '"><br><br>';
-    
+    ?>
+    <div class="scholarpress-field">
+    <?php
+    scholarpress_coins__input_field(
+        'source',
+        __( 'Source (Website/Publication Title):', 'scholarpress-coins' ),
+        $metabox_display_data['_coins-source'],
+        false
+    );
+    ?>
+    </div>
+
+    <div class="scholarpress-field">
+    <?php
+    scholarpress_coins__input_field(
+        'date',
+        __( 'Date:', 'scholarpress-coins' ),
+        $metabox_display_data['_coins-date'],
+        false
+    );
+    ?>
+    </div>
+
+    <?php
     // Identiier field
-    echo '<label for="coins-identifier">' . __( 'Identifier: (URL)', 'scholarpress-coins' ) . ' </label>';
-    echo '<input class="widefat" id="coins-identifier" name="_coins-identifier" type="text" value="' . esc_attr( $metabox_display_data['_coins-identifier'] ) . '"';
-    if ( in_array( '_coins-identifier', $locked_fields ) ) {
-        echo ' disabled';
-    }
-    echo '>';
-    echo '<input id="coins-identifier-lock" name="_coins-identifier-lock" type="checkbox"';
-    if ( in_array( '_coins-identifier', $locked_fields ) ) {
-        echo ' checked';
-    }
-    echo '>';
-    echo '<label for="coins-identifier-lock">' . __( 'Lock field to post URL?', 'scholarpress-coins' ) . '</label><br><br>';
+    ?>
+    <div class="scholarpress-field">
+    <?php
+    scholarpress_coins__input_field(
+        'identifier',
+        __( 'Identifier (URL):', 'scholarpress-coins' ),
+        $metabox_display_data['_coins-identifier'],
+        in_array( '_coins-identifier', $locked_fields )
+    );
+
+    scholarpress_coins__field_lock(
+        'identifier',
+        in_array( '_coins-identifier', $locked_fields ),
+        __( 'Lock field to post URL?', 'scholarpress-coins' )
+    );
+
     $identifier = get_permalink( $post->ID );
-    echo '<input type="hidden" class="coins-identifier-hidden" value="' . esc_url( $identifier ) . '">';
+    ?>
+    <input type="hidden" class="coins-identifier-hidden" value="<?php echo esc_url( $identifier ); ?>">
+    </div>
+<?php
 }
 
 add_action( 'save_post', 'scholarpress_coins_save_metadata' );
 function scholarpress_coins_save_metadata( $post_id ) {
     $legacy_data = scholarpress_coins_get_legacy_post_data( $post_id );
     foreach( scholarpress_coins_keys() as $key ) {
-        if ( array_key_exists( $key . '-lock', $_POST ) && 'on' === $_POST[$key . '-lock'] ) {
+        if ( $key === '_coins-author-first' && $_POST['_coins-author-lock'] === 'on' ) {
+            $author = get_userdata( $_POST['post_author'] );
+            $authorLast = $author->last_name;
+            $authorFirst = $author->first_name;
+            if ( ! empty( $authorLast ) &&  ! empty( $authorFirst ) ) {
+                update_post_meta( $post_id, '_coins-author-first', $authorFirst );
+                update_post_meta( $post_id, '_coins-author-last', $authorLast );
+            } else {
+                update_post_meta( $post_id, '_coins-author-first', $author->display_name );
+                update_post_meta( $post_id, '_coins-author-last', 'scholarpress_coins_empty' );
+                unset( $_POST['_coins-author-last'] );
+            }
+            update_post_meta( $post_id, '_coins-author-first-lock', true );
+        } elseif ( array_key_exists( $key . '-lock', $_POST ) && 'on' === $_POST[$key . '-lock'] ) {
             update_post_meta( $post_id, $key . '-lock', true );
             if ( $key == '_coins-title' ) {
                 update_post_meta( $post_id, '_coins-title', $_POST['post_title'] );
-            }
-            elseif ( $key == '_coins-author-first' ) {
-                $author = get_userdata( $_POST['post_author'] );
-                $authorLast = $author->last_name;
-                $authorFirst = $author->first_name;
-                if ( ! empty( $authorLast ) &&  ! empty( $authorFirst ) ) {
-                    update_post_meta( $post_id, '_coins-author-first', $authorFirst );
-                    update_post_meta( $post_id, '_coins-author-last', $authorLast );
-                } else {
-                    update_post_meta( $post_id, '_coins-author-first', $author->display_name );
-                    update_post_meta( $post_id, '_coins-author-last', 'scholarpress_coins_empty' );
-                    unset( $_POST['_coins-author-last'] );
-                }
             } elseif ( $key == '_coins-subjects' ) {
                 $cats = $_POST['post_category'];
                 $cat_names = array();
@@ -215,6 +238,7 @@ function scholarpress_coins_add_coins_to_content( $content ) {
         return $content;
     }
     $coinsTitle = apply_filters('scholarpress_coins_span_title', scholarpress_coins_get_span_title( $display_data ) );
+   // var_dump($coinsTitle);
     $content = '<span class="Z3988" title="' . esc_html( $coinsTitle ) . '"></span>' . $content;
     return $content;
 }
@@ -242,9 +266,17 @@ function scholarpress_coins_get_span_title( $data ) {
             $coinsTitle .= '&amp;rft.subject=' . urlencode( $subject );
         }
     }
-    if ( ! empty( $data['_coins-author-last'] ) && ! empty( $data['_coins-author-first'] ) ) {
-        $coinsTitle .=  '&amp;rft.aulast=' . urlencode( $data['_coins-author-last'] )
-                        . '&amp;rft.aufirst=' . urlencode( $data['_coins-author-first'] );
+    if ( ! empty( $data['_coins-author-last'] ) ) {
+        if ( ! is_array($data['_coins-author-first'] ) ) {
+            $data['_coins-author-first'] = str_split( $data['_coins-author-first'], strlen( $data['_coins-author-first'] ) + 1 );
+            $data['_coins-author-last'] = str_split( $data['_coins-author-last'], strlen( $data['_coins-author-last'] ) + 1 );
+        }
+        foreach( $data['_coins-author-first'] as $index => $author_first ) {
+            $coinsTitle .=  '&amp;rft.au=' . urlencode( $author_first );
+            if ( ! empty($data['_coins-author-last'][$index] ) ) {
+                $coinsTitle .= urlencode( ' ' . $data['_coins-author-last'][$index] );
+            } 
+        }
     } else {
         $coinsTitle .= '&amp;rft.au=' . urlencode( $data['_coins-author-first'] );
     }