I have a couple of cat health care books to recommend:
The first one is The Cornell Book of Cats. it's written by the faculity, staff and associates of Cornell Feline Health Center, College of Veterinary Medicine, Cornell University.
This book is very large (over 400 pages) and very comprehensive, some of the topics in the book are: behavior, anatomy, illnesses of cats, gentics and geriatrics. This book uses a lot of veterinary terms, the first time a term is used it is in boldface and the meaning is explained.
The second book is What Your Cat is Trying to Tell You, and it's written by a veterinarian. This book is a much smaller book and it is easier to understand. The book gives symptoms that a cat may be showing, what the possible cause is, how you should care for the cat and whether or not veterinary care is needed. Toward the end of the book there is various health related information, a couple of these are what to look for if you examine your cat at home, and various problems different breeds are prone to.