Approach with us hosting the images.

config/_extras.yml

@@ -1,16 +1,16 @@
 books:
   - name: 'Jump Start Bootstrap: Get Up to Speed With Bootstrap in a Weekend'
+    img: /assets/img/books/Jump-Start-Bootstrap-Speed-Weekend.jpg
     url: 'https://www.amazon.com/Jump-Start-Bootstrap-Speed-Weekend/dp/0992279437/ref=as_li_ss_il?_encoding=UTF8&psc=1&refRID=2WP7MEQ0KPAHQS6YT117&linkCode=li3&tag=bcdn-20&linkId=b44f87f6e04d5eb7e6b49af61cd0e422'
-    asin: '0992279437'
   - name: 'Building Progressive Web Apps: Bringing the Power of Native to the Browser'
+    img: /assets/img/books/Building-Progressive-Web-Apps-Bringing-ebook.jpg
     url: 'https://www.amazon.com/Building-Progressive-Web-Apps-Bringing-ebook/dp/B075HP52WY/ref=as_li_ss_il?ie=UTF8&linkCode=li3&tag=bcdn-20&linkId=013ca3a2eb57883d255384829ec0a6a2'
-    asin: 'B075HP52WY'
   - name: 'Coding For Dummies (For Dummies (Computer/Tech))'
+    img: /assets/img/books/Coding-Dummies-Computer-Tech.jpg
     url: 'https://www.amazon.com/Coding-Dummies-Computer-Tech/dp/1119293324/ref=as_li_ss_il?ie=UTF8&linkCode=li3&tag=bcdn-20&linkId=fb405dc117a040e91557b45f6dc1094b'
-    asin: '1119293324'
   - name: 'Bootstrap in 24 Hours, Sams Teach Yourself'
+    img: /assets/img/books/Bootstrap-Hours-Sams-Teach-Yourself-ebook.jpg
     url: 'https://www.amazon.com/Bootstrap-Hours-Sams-Teach-Yourself-ebook/dp/B017M8OWZQ/ref=as_li_ss_il?ie=UTF8&linkCode=li3&tag=bcdn-20&linkId=f8a39275b5204f5f2d0427a1ef1c4f83'
-    asin: 'B017M8OWZQ'
 showcase:
   - name: Microsoft Education
     img: /assets/img/showcase/microsoft-education.png

config/helmet-csp.js

@@ -51,10 +51,7 @@ const CSP = {
         '*.2mdn.net',
         'launchbit.com',
         'www.launchbit.com',
-        'www.ziprecruiter.com',
-        'ws-na.amazon-adsystem.com',
-        'ir-na.amazon-adsystem.com',
-        'images-na.ssl-images-amazon.com'
+        'www.ziprecruiter.com'
     ],
     fontSrc: [
         '\'self\'',

public/assets/css/style.css

@@ -103,3 +103,9 @@ footer {
     line-height: 1;
     text-transform: uppercase;
 }
+
+.book-card img {
+    /* use the height of the smallest image so that they are aligned */
+    height: 250px;
+    width: auto;
+}

test/books_test.js

@@ -1,7 +1,9 @@
 'use strict';
 
 const assert = require('assert').strict;
+const path = require('path');
 const htmlEncode = require('htmlencode').htmlEncode;
+const staticify = require('staticify')(path.join(__dirname, '../public'));
 const helpers = require('./test_helpers.js');
 
 describe('books', () => {
@@ -34,32 +36,21 @@ describe('books', () => {
 
     config.books.forEach((book) => {
         describe(book.name, () => {
-            const beforeTrackImgUrl = `https://ws-na.amazon-adsystem.com/widgets/q?_encoding=UTF8&ASIN=${book.asin}&Format=_SL250_&ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=bcdn-20`;
-            const afterTrackImgUrl = `https://ir-na.amazon-adsystem.com/e/ir?t=bcdn-20&l=li3&o=1&a=${book.asin}`;
-
             it('has name', (done) => {
                 assert.ok(response.body.includes(book.name),
                     `Expects response body to include "${book.name}"`);
                 done();
             });
-
+            it('has image', (done) => {
+                assert.ok(response.body.includes(staticify.getVersionedPath(book.img)),
+                    `Expects response body to include "${book.img}"`);
+                done();
+            });
             it('has url', (done) => {
                 assert.ok(response.body.includes(htmlEncode(book.url)),
                     `Expects response body to include "${book.url}"`);
                 done();
             });
-
-            it('has before tracking image', (done) => {
-                assert.ok(response.body.includes(htmlEncode(beforeTrackImgUrl)),
-                    `Expects response body to include "${beforeTrackImgUrl}"`);
-                done();
-            });
-
-            it('has after tracking image', (done) => {
-                assert.ok(response.body.includes(htmlEncode(afterTrackImgUrl)),
-                    `Expects response body to include "${afterTrackImgUrl}"`);
-                done();
-            });
         });
     });
 });

views/_partials/books.pug

@@ -1,15 +1,9 @@
--
-    const beforeTrackImgUrl = `https://ws-na.amazon-adsystem.com/widgets/q?_encoding=UTF8&ASIN=${book.asin}&Format=_SL250_&ID=AsinImage&MarketPlace=US&ServiceVersion=20070822&WS=1&tag=bcdn-20`;
-    const afterTrackImgUrl = `https://ir-na.amazon-adsystem.com/e/ir?t=bcdn-20&l=li3&o=1&a=${book.asin}`;
-
 .card-deck
-    .card.border-primary.py-3.px-md-3.mb-3.text-center
+    .card.border-primary.py-3.px-md-3.mb-3.text-center.book-card
         .card-header.bg-transparent.border-0
-            h3.h4.card-title.mb-0=book.name
+            img.card-img-top.img-fluid.d-block.mx-auto(src=getVersionedPath(book.img), alt=`${book.name} cover`)
         .card-body.bg-transparent.border-0
-            a(href=book.url, rel='noopener', target='_blank')
-                img.border-0(src=beforeTrackImgUrl, alt='')
-            img.border-0.m-0(src=afterTrackImgUrl, width='1', height='1', alt='')
+            h3.h4.card-title.mb-0=book.name
         .card-footer.bg-transparent.border-0
             a.btn.btn-primary.btn-lg.btn-block.w-75.mx-auto.py-3(href=book.url, rel='noopener', target='_blank') Buy from Amazon