I recently started reading WordPress 3 Plugin Development Essentials. While I haven’t gotten far enough into it to post a review, there is one great quote in the first chapter I wanted to share:
Opening up an existing WordPress plugin is a bit like going into a public restroom: it may be perfectly clean and hygienic, or it may be a rank and apoplectic mess of functions, logic, and HTML. Just be prepared.
I think I’m going to like this book. 🙂