An excellent book that covers the legends of the WordPress community and how the World's #1 community driven Web content management system got built over a period of time.
As this book is written by the community I expected it to be more biased, however I found a really interesting description of events that led WordPress to a leading CMS worldwide and created a huge community around it.
I learned a few bits about the WordPress project that I previously didn’t know. It also shed light on how parts of the project came to be organized in the way they still are.