Drupal in action (zatim jako MEAP, prvnich par kapitol)
http://www.manning.com/gildesgame/

Pro Drupal Development
http://www.apress.com/book/view/1430209895

Building Powerful and Robust Websites with Drupal 6
http://www.packtpub.com/drupal-6-create-powerful-websites/book

...dalsi Drupal knihy od Packt publishing
http://www.packtpub.com/drupal-books