If you’re looking to create extensions for Joomla! 1.5 then you should really check out Learning Joomla! 1.5 Extension Development. I had a project that required a custom component to be created, and the online documentation wasn’t really as good as I’d of liked it to of been.
So I went looking to see if any books had been published recently on extension development. Learning Joomla! 1.5 Extension Development got some decent review online, and I was really stumped with creating my component. So a copy was ordered.
The book does an excellent job of building an extension that makes use of most of the features that would be found in a typical extension. Covering, components, modules, as well as plugins.
With it’s focus on MVC practices, this at first seemed like overkill to me, but once all the features were piling up, it really paid off.
The chapters on creating the admin end of a component were extremely valuable to me. My client now has an easy to use custom component that makes use of the Joomla! admin interface for a seemless CMS experience.