diff --git a/.github/workflows/release-build.yaml b/.github/workflows/release-build.yaml
index dc20889..013e9c2 100644
--- a/.github/workflows/release-build.yaml
+++ b/.github/workflows/release-build.yaml
@@ -10,7 +10,7 @@ jobs:
       matrix:
         goos: [linux, windows, darwin]
         goarch: ["386", amd64, arm64]
-        goversion: ["1.16", "1.17"]
+        goversion: ["1.17"]
         exclude:  
           - goarch: "386"
             goos: darwin 
diff --git a/jsonpath.go b/jsonpath.go
index d68fa61..448749e 100644
--- a/jsonpath.go
+++ b/jsonpath.go
@@ -3,6 +3,7 @@ package jsonpath
 import (
 	"encoding/json"
 	"fmt"
+	"strconv"
 	"strings"
 
 	"github.com/evilmonkeyinc/jsonpath/token"
@@ -95,19 +96,42 @@ func (query *JSONPath) Query(root interface{}) (interface{}, error) {
 // QueryString will return the result of the JSONPath query applied against the specified JSON data.
 func (query *JSONPath) QueryString(jsonData string) (interface{}, error) {
 	jsonData = strings.TrimSpace(jsonData)
+	if jsonData == "" {
+		return nil, getInvalidJSONData(errDataIsUnexpectedTypeOrNil)
+	}
 
 	var root interface{}
+
 	if strings.HasPrefix(jsonData, "{") && strings.HasSuffix(jsonData, "}") {
+		// object
 		root = make(map[string]interface{})
+		if err := json.Unmarshal([]byte(jsonData), &root); err != nil {
+			return nil, getInvalidJSONData(err)
+		}
 	} else if strings.HasPrefix(jsonData, "[") && strings.HasSuffix(jsonData, "]") {
+		// array
 		root = make([]interface{}, 0)
+		if err := json.Unmarshal([]byte(jsonData), &root); err != nil {
+			return nil, getInvalidJSONData(err)
+		}
+	} else if len(jsonData) > 2 && strings.HasPrefix(jsonData, "\"") && strings.HasPrefix(jsonData, "\"") {
+		// string
+		root = jsonData[1 : len(jsonData)-1]
+	} else if strings.ToLower(jsonData) == "true" {
+		// bool true
+		root = true
+	} else if strings.ToLower(jsonData) == "false" {
+		// bool false
+		root = false
+	} else if val, err := strconv.ParseInt(jsonData, 10, 64); err == nil {
+		// integer
+		root = val
+	} else if val, err := strconv.ParseFloat(jsonData, 64); err == nil {
+		// float
+		root = val
 	} else {
 		return nil, getInvalidJSONData(errDataIsUnexpectedTypeOrNil)
 	}
 
-	if err := json.Unmarshal([]byte(jsonData), &root); err != nil {
-		return nil, getInvalidJSONData(err)
-	}
-
 	return query.Query(root)
 }
diff --git a/jsonpath_test.go b/jsonpath_test.go
index 552fd84..6ba8410 100644
--- a/jsonpath_test.go
+++ b/jsonpath_test.go
@@ -900,6 +900,7 @@ func Test_JSONPath_QueryString(t *testing.T) {
 	sampleQuery, _ := Compile("$.expensive")
 	altSampleQuery, _ := Compile("$..author")
 	lengthQuery, _ := Compile("$.length")
+	rootQuery, _ := Compile("$")
 
 	type input struct {
 		jsonPath *JSONPath
@@ -923,6 +924,60 @@ func Test_JSONPath_QueryString(t *testing.T) {
 				err: "invalid data. unexpected type or nil",
 			},
 		},
+		{
+			input: input{
+				jsonPath: rootQuery,
+				jsonData: "42",
+			},
+			expected: expected{
+				value: int64(42),
+			},
+		},
+		{
+			input: input{
+				jsonPath: rootQuery,
+				jsonData: "3.14",
+			},
+			expected: expected{
+				value: float64(3.14),
+			},
+		},
+		{
+			input: input{
+				jsonPath: rootQuery,
+				jsonData: "true",
+			},
+			expected: expected{
+				value: true,
+			},
+		},
+		{
+			input: input{
+				jsonPath: rootQuery,
+				jsonData: "false",
+			},
+			expected: expected{
+				value: false,
+			},
+		},
+		{
+			input: input{
+				jsonPath: rootQuery,
+				jsonData: "not a json string",
+			},
+			expected: expected{
+				err: "invalid data. unexpected type or nil",
+			},
+		},
+		{
+			input: input{
+				jsonPath: rootQuery,
+				jsonData: `"json string"`,
+			},
+			expected: expected{
+				value: "json string",
+			},
+		},
 		{
 			input: input{
 				jsonPath: &JSONPath{
diff --git a/test/README.md b/test/README.md
index 415daf8..7bd7d40 100644
--- a/test/README.md
+++ b/test/README.md
@@ -154,7 +154,7 @@ This implementation would be closer to the `Scalar consensus` as it does not alw
 |`$.*.*`|`[[1, 2, 3], [4, 5, 6]]`|`[1 2 3 4 5 6]`|`[[1 2 3] [4 5 6]]`|:no_entry:|
 |`$..*`|`{ "key": "value", "another key": { "complex": "string", "primitives": [0, 1] } }`|`[string value 0 1 [0 1] map[complex:string primitives:[0 1]]]`|`[string value 0 1 [0 1] map[complex:string primitives:[0 1]]]`|:white_check_mark:|
 |`$..*`|`[ 40, null, 42 ]`|`[40 42 <nil>]`|`[40 42 <nil>]`|:white_check_mark:|
-|`$..*`|`42`|`nil`|`nil`|:white_check_mark:|
+|`$..*`|`42`|`[]`|`[]`|:white_check_mark:|
 |`$a`|`{"a": 1, "$a": 2}`|`nil`|`nil`|:white_check_mark:|
 |`.key`|`{ "key": "value" }`|`nil`|`nil`|:white_check_mark:|
 |`key`|`{ "key": "value" }`|`nil`|`nil`|:white_check_mark:|
@@ -256,9 +256,9 @@ This implementation would be closer to the `Scalar consensus` as it does not alw
 |`$..`|`[{"a": {"b": "c"}}, [0, 1]]`|none|`[[map[a:map[b:c]] [0 1]] map[a:map[b:c]] map[b:c] c [0 1] 0 1]`|:question:|
 |`$.key..`|`{"some key": "value", "key": {"complex": "string", "primitives": [0, 1]}}`|none|`[map[complex:string primitives:[0 1]] [0 1] 0 1 string]`|:question:|
 |`$`|`{ "key": "value", "another key": { "complex": [ "a", 1 ] } }`|`map[another key:map[complex:[a 1]] key:value]`|`map[another key:map[complex:[a 1]] key:value]`|:white_check_mark:|
-|`$`|`42`|`42`|`nil`|:no_entry:|
-|`$`|`false`|`false`|`nil`|:no_entry:|
-|`$`|`true`|`false`|`nil`|:no_entry:|
+|`$`|`42`|`42`|`42`|:white_check_mark:|
+|`$`|`false`|`false`|`false`|:white_check_mark:|
+|`$`|`true`|`true`|`true`|:white_check_mark:|
 |`$[(@.length-1)]`|`["first", "second", "third", "forth", "fifth"]`|`nil`|`fifth`|:no_entry:|
 
 
diff --git a/test/dot_test.go b/test/dot_test.go
index 4f7bbd2..f4f7c17 100644
--- a/test/dot_test.go
+++ b/test/dot_test.go
@@ -342,9 +342,9 @@ func Test_Dot(t *testing.T) {
 		{
 			query:         `$..*`,
 			data:          `42`,
-			expected:      nil,
-			consensus:     nil,
-			expectedError: "invalid data. unexpected type or nil",
+			expected:      []interface{}{},
+			consensus:     []interface{}{},
+			expectedError: "",
 		},
 		{
 			query:         `$a`,
diff --git a/test/misc_test.go b/test/misc_test.go
index b9620e8..118e841 100644
--- a/test/misc_test.go
+++ b/test/misc_test.go
@@ -48,25 +48,25 @@ func Test_Misc(t *testing.T) {
 			expectedError: "",
 		},
 		{
-			query:         `$`, // TODO : should we support more than [] and {}
+			query:         `$`,
 			data:          `42`,
-			expected:      nil,
-			consensus:     float64(42),
-			expectedError: "invalid data. unexpected type or nil",
+			expected:      int64(42),
+			consensus:     int64(42),
+			expectedError: "",
 		},
 		{
-			query:         `$`, // TODO : should we support more than [] and {}
+			query:         `$`,
 			data:          `false`,
-			expected:      nil,
+			expected:      false,
 			consensus:     false,
-			expectedError: "invalid data. unexpected type or nil",
+			expectedError: "",
 		},
 		{
-			query:         `$`, // TODO : should we support more than [] and {}
+			query:         `$`,
 			data:          `true`,
-			expected:      nil,
-			consensus:     false,
-			expectedError: "invalid data. unexpected type or nil",
+			expected:      true,
+			consensus:     true,
+			expectedError: "",
 		},
 		{
 			query:         `$[(@.length-1)]`,