T.F.H. Publications - The Professional's Book of Koi (Hardcover) No other book about koi manages to capture the esthetic appeal of this brilliantly colorful fish and combine it with purely practical considerations of maintenance, breeding and health care as this one does. With more than 200 full-color photos that capture the often subtle differences in color between the many color varieties, it has a revealing glossary of koi terms and color variety names that completely clarify the confusing terminology of the Japanese koi world. This book is excellent for the expert koi fancier as well as the beginner or potential keeper.