Health in general

" In 1948, in its constitution, the World Health Organization (WHO) defined health as "a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity" . The statement has been modified to include the ability to lead a "socially and economically productive life." "

From wikipedia.org

Net Health Book
This is a free Internet based health book with information about most major medical diseases, their symptoms, diagnoses, and treatments, all in simple, everyday language.