A well-written introduction to WordPress administration and web development.
A practical guide to a complex topic. Continue reading CSS – The Definitive Guide, 4th Edition
An inspiring and well written guide to WordPress web application development.
A very thorough primer on MySQL/MariaDB.
A well and clear written primer on PHP.
Nice beginners manual on using WordPress.
Great book on web application programming, Object Oriented PHP, Test Driven PHP. Continue reading PHP In Action: Objects, Design, Agility.