This book is a treatise on all disorders & treatments in medicine. It is an authoritative & exhaustive book..basically a Bible for students of medicine. Each topic is authored by an expert in the field.It was first written & edited by Dr Harrison & Later By Dr Eugene Brunwald,Dr Isselbacher, Dr Fausi, Dr Kasper & other luminaries in the medical field. The more recent editions have been supplimented by a CD ROM with videos of examination & various test procedures which helps a physician to arrive at a diagnosis & treat the patient.