Pro Drupal Development is strongly recommended for any PHP programmer who wants to see who is really in-depth how Drupal works and how to make the most of it. Drupal? Pro Development was written to equip you with knowledge to customize your Drupal installation however you want. You will learn how to work in every part of Drupal, including user management, session, node system, caching, and various APIs available to you. Thus, the authors have included the information you need to optimize your Drupal installation to work well in high load situations. Also featured is information on Drupal security and best practices, as well as integration of Ajax and the internationalization of your Drupal website. Simply put, if you are working with Drupal at all, then you need this book. This book is written by Drupal core developers.