Magento 1.3: PHP Developer's Guide by Jamie Huskisson
This book is a practical tutorial, filled with examples, aimed at people with no experience of programming web sites using the Magento system. If you are a PHP developer who wants to understand the architecture of Magento, learn how to extend the system with PHP code, add new features, and integrate Magento with a third-party CMS, this book is for you. You are expected to be a confident PHP 5 developer. No experience of Magento development is expected, although you should be familiar with the operation of Magento. No experience of the Zend framework is expected.