SugarCRM Developer’s Manual: Customize and extend SugarCRM PDF Download for free:
This is a developer’s manual for SugarCRM. It focuses on customizing SugarCRM. It provides an overview of the architecture of the application and the database, and covers the essential steps for hooking your module into the SugarCRM infrastructure. The book is for PHP developers working with SugarCRM, who want to extend its capabilities. Readers should have a basic knowledge of SugarCRM as the book does not cover installation and usage of SugarCRM. This can be gained from Implementing SugarCRM.