I had the privilege of helping out with one chapter in The Official Ubuntu Server Book–I didn’t do enough to earn an author’s credit or get a mention on the cover or anything, but Kyle Rankin was kind enough to mention me in the Acknowledgements on page xxiii. Thanks for the chance to contribute, Kyle and Mako!
Check out the Amazon page for the book. If you run Ubuntu on your server or are considering doing so, you are likely to find the book both interesting and useful.
EDIT: It’s a great read, and would be without my small contribution.