Learning Drupal 6 Module Development
A Practical Tutorial for Creating your First Drupal 6 Modules With PHPeBook - 2008
This book is written for PHP developers who want to add custom features to Drupal. You will need to know the basics of PHP and MySQL programming, but no experience of programming Drupal is required, although you will be expected to be familiar with the basic operation of Drupal.
Publisher: Birmingham, [England] : Packt Publishing, 2008 (Norwood, Mass. : Books24x7.com [generator])