WordPress is one of the most popular blogging programs available and plugins associated with it are also quite popular. This book shows the reader how to create your own and provides excellent instructions on doing this. One concept that is discussed early on is "dogfooding your plugins." This means you should strive to create a plugin that satisfies your needs. And while it addresses a need you have, it very likely is one that others have as well. With all the plugins available now, a plugin that addresses a unique need should become popular quickly.
The book devotes chapters to the creation of seven different plugins, including Digg This (social bookmarking plugin), Live Blogroll, The Wall, and Post Types among others. Each chapter describes in step by step details how to create the plugin and gives numerous code examples along the way. It also explains unfamiliar concepts in a way that makes them easy to quickly understand. There are also brief explanations of how JQuery and Ajax (two important programming languages used in developing plugins) work. The book's final chapter gives tips on documenting and promoting your plugin, as well as ways to improve your overall WordPress knowledge.
Every time I check the WordPress plugin directory, it seems there are quite a few amazing new plugins to try out which have been created by talented people. This book will help you to become one of them.