Merge pull request #1752 from tcort/javascript-spessore

books: add JavaScript Spessore

free-programming-books.md

@@ -1295,6 +1295,7 @@ Original Source: [List of freely available programming books](http://web.archive
 * [JavaScript Fundamentals, Plus a Dash Of JQuery - for dinner ladies](http://nicholasjohnson.com/javascript-book/)
 * [JavaScript Garden](http://bonsaiden.github.io/JavaScript-Garden/) (Maintained by Tim Ruffles)
 * [JavaScript Patterns Collection](http://shichuan.github.io/javascript-patterns/) - Shi Chuan
+* [JavaScript Spessore](https://leanpub.com/javascript-spessore/read) - Reginald Braithwaite
 * [Javascript Succinctly, Syncfusion](https://www.syncfusion.com/resources/techportal/ebooks/javascript) (PDF, Kindle) *(Just fill the fields with any values)*
 * [JavaScript the Right Way](https://github.com/braziljs/js-the-right-way)
 * [jQuery Fundamentals](http://jqfundamentals.com) (starts with JavaScript basics)