Merck

The Merck Manual of Medical Information, Second Edition: The World's Most Widely Used Medical Reference - Now In Everyday Language
$37.50
I would recommend this medical manual to everyone. It is clear and concise and very informative. A great improvement from the first edition.

The Merck Manual of Children's Health
$7.99
If you have a regular Home Edition of the Merck Manual, then you don't need the Children's version (that's why I did not give it 5 stars). Everything is in the regular version, in some cases more detailed. Either version gives you the newest (look at the year of the edition) detailed medical info with causes/ symptoms/ diagnoses/ prevention+treatment. For treatment, the Merck Manual generally tells you what a doctor might or should do and what tests could and should be done and what kind of drugs might be used, but it generally does not tell you how to treat yourself with home remedies. But it tells you a lot of things doctors don't want or forget to tell you (like the duration or the outlook of certain diseases or side effects of drugs or accuracy of tests). If you are paranoid, you do not want to read a Merck Manual (you might identify yourself or others with all kinds of diseases).

The Merck Manual Home Health Handbook: Third Home Edition
$39.95
Merck's Home Health Handbook is written in everyday easy-to-understand language and provides information on health care for children and adults.
It covers all types of illnesses,explains the symptoms,treatments and prevention.
Great value - highly recommended.

The Merck Manual of Patient Symptoms
$24.95
As with most of Merck's products, this book is top notch. It is exceptionally useful, complete, and well organized, all at a bargain price.