I am very happy that this book is in my personal library. This book is intended to serve as a reference in studying Chullin's paper. It is useless as a standalone book. But studying Chullin, one cannot do without it. The artwork is phenomenal. I grew up on a farm and saw a lot of animals inside. Even so, I would not have been able to visualize most of the descriptions in Chullin without this book. So if you are serious about studying Chullin, this book is a must.