"The Merck Manual Eighteenth Edition"
This book is designed as a reference for medical
professionals, doctors, nurses, etc. It is a superb
addition to your home reference library. It is
very technical in nature. It will allow
you to discuss medical conditions with your doctor
in a very detailed way. Be aware that there is a
professional version of this book, as well as a
"home edition". The home edition is very simplified
and loses much of the value of the original. It has
very detailed discussions of signs, symptoms, and
causes of virtually every medical condition.