Useful Books by Other People
Advanced PHP

Title: Programming PHP (2nd Edition)
Author: Rasmus Lerdorf, Kevin Tatroe
List Price: $39.96; Amazon Price: $26.39
An authoritative guide written by the creator of PHP, Rasmus Lerdorf. A lot of excellent, accurate technical information written concisely.

Title: PHP Developer's Cookbook
Author: Sterling Hughes
List Price: $49.99; Amazon Price: $34.99
This book is full of useful code. Each section presents a task you may want to perform, provides code to perform the task, and explains the code.

Title: PHP Functions Essential Reference
Author: Zak Greant
List Price: $39.95; Amazon Price: $27.97
A complete reference to hundreds of the most essential PHP functions with descriptions and examples of their use.

Title: Essential PHP Security
Author: Chris Shiflett
List Price: $29.95; Amazon Price: $18.87
Explains the most common types of attacks and how to write code that isn't susceptible to them. Written by a PHP security expert.

Title: Advanced PHP Programming
Author: George Schlossnagle
List Price: $49.95; Amazon Price: $31.49
Provides experienced developers with techniques for using PHP on a large scale in the enterprise. Focusing on PHP 5, the book includes object-oriented programming techniques, unit testing, security, caching, developing scalable distributed Web applications, and performance tuning.
Advanced MySQL

Title: MySQL (Third Edition)
Author: Paul DuBois
List Price: $49.95; Amazon Price: $32.99
Comprehensive guide to MySQL and all its features. Over 800 pages.

Title: MySQL Cookbook
Author: Paul DuBois
List Price: $49.95; Amazon Price: $34.97
Code for scores of solutions to MySQL problems. Over 1000 pages covering in detail all aspects of MySQL.
HTML and XHTML

Title: HTML & XHTML: The Definitive Guide (5th Edition)
Author: Chuck Musciano, Bill Kennedy
List Price: $39.95; Amazon Price: $25.17
Very well written, thorough book covering HTML.
CSS

Title: Cascading Style Sheets: The Definitive Guide (2nd Edition)
Author: Eric A. Meyer
List Price: $39.95; Amazon Price: $25.17
Very well written, thorough book covering CSS.

Title: CSS Mastery: Advanced Web Standards Solutions
Author: Andy Budd
List Price: $34.95; Amazon Price: $22.05
This book brings together the most useful CSS techniques in one place, focusing on real-world browser issues. Includes the latest CSS tips, tricks, and techniques. Provides an in-depth guide to browser bugs, hacks, and filters.
JavaScript

Title: JavaScript: The Definitive Guide (4th Edition)
Author: David Flanagan
List Price: $44.95; Amazon Price: $28.32
Very well written and thorough book covering JavaScript.
Web Design

Title: Designing Web Usability: The Practice of Simplicity
Author: Jakob Nielsen
List Price: $45.00; Amazon Price: $28.35
A book on Web Design that focuses on usability. The author is a well-known usability expert who consults, speaks, and conducts research on Web site usability.

Title: Don't Make Me Think (2nd Edition)
Author: Steve Krug
List Price: $35.00; Amazon Price: $22.05
A classic book on common sense Web usability.