On this bookshelf you'll find...
books on some of the more popular programming languages used to develop web sites.
Search All Of Amazon If You Don't Find What You're Looking For Here
Javascript For The World Wide Web
While outside the scope of Joy Of Code, learning a little Javascript could not hurt. JS, among other things, can put a little brains into your otherwise stateless XHTML.
This book provides an overall perspective and lots of great examples.
PERL And CGI
This book isn't really for a beginner although it was the first book I ever bought to get me started with the magic of PERL - the most widely used programming language on the web.