Drupal CMS

Drupal 7 Explained: Your Step-by-Step Guide by Stephen Burge

Drupal For Dummies by Lynn Beighley

Drupal 7 Bible by Ric Shreves

Drupal 7 Primer: Creating CMS-Based Websites: A Guide for Beginners by Todd Kelsey

How to Theme Drupal: From Blank to Beautiful in 2 Hours by Aleks Monahan

Drupal 7: the Essentials by Johan Falk and NodeOne

Drupal 7. Quick Essentials. For Beginners. 30 pages to success by Alex Shilov

Beginning Drupal 7 (Expert’s Voice in Open Source) by Todd Tomlinson

CMS Security Handbook: The Comprehensive Guide for WordPress, Joomla, Drupal, and Plone by Tom Canavan

Professional Mobile Web Development with WordPress, Joomla! and Drupal by James Pearce