Merge pull request #1211 from eclutsk/free-programming-books.md

Added "Pick/Basic: A Programmer's Guide - Jonathan E. Sisk", under Basic...

free-programming-books.md

@@ -679,6 +679,7 @@
 * [A beginner's guide to Gambas](http://beginnersguidetogambas.com/)
 * [BASIC programming language - Wikibooks](http://en.wikibooks.org/wiki/Category%3ABASIC_programming_language)
 * [How To Gambas3 Guides](http://howtogambas.org/index.php?page=cedi)
+* [Pick/Basic: A Programmer's Guide](http://www.jes.com/pb/) - Jonathan E. Sisk
 * [Visual Basic Essentials](http://www.techotopia.com/index.php/Visual_Basic_Essentials)