designimplementation

The most complete, authoritative technical guide to the FreeBSD kernel’s internal structure has now been extensively updated to cover all major improvements between Versions 5 and 11. Approximately one-third of this edition’s content is completely new, and another one-third has been extensively rewritten.

This book is due to release on September 15, 2014. You can purchase the hardcover from here: http://www.amazon.com/Design-Implementation-FreeBSD-Operating-Edition/dp/0321968972