This is the first book dedicated to Textpattern development, a popular web site framework that allows its users to build up standards-compliant professional web sites with only a basic knowledge of the underlying technology. Written by five experts, it is suitable for every level of reader from novice to expert, taking the reader from the basics of the subject such as installation, right up to advanced subjects like writing plugins. It includes case studies and reference sections. It is also open source, so free to use, and has become very popular with tens of thousands of downloads to date.