It is written as an informative/educational book. It is very well written, and there is just a ton of information. Nobody knows Grey's like Bobbi and the information is invaluable. While the book is written with Grey's in mind, much of the information applies to most species.
Bobbi has been breeding/raising Grey's since before me, even! As long as I can remember anyway. If I remember correctly the book was originally self-published sometime in the late 90's, as a paperback. One of the publishers picked it up sometime later and it is widely distributed now, and can even be obtained on Amazon.