Pro Drupal 7 Development (Expert's Voice in Open Source)
Pro Drupal Development
Pro Drupal 7 for Windows Developers
The Definitive Guide to Drupal 7
Enterprise Drupal 8 Development For Advanced Projects and Large Development Teams
Beginning Drupal 8
Foundation Drupal 7 Learn How to Use the Drupal Framework to Quickly Build Feature-rich Websites
Decoupling Drupal A Decoupled Design Approach for Web Applications
Pro Drupal as an Enterprise Development Platform
Drupal 8 for Absolute Beginners
