Amazon.com (ISBN 0684803763, Hardcover)

Mindhunter enters the minds of some of the country's most notorious serial killers to tell the real-life story of the Investigative Support Unit (ISU) -- the FBI's special force that has assisted state and local police in cracking some of the country's most celebrated serial murder and rape cases. The unit specializes in understanding the chemistry and mechanical workings of the brain's of these serial criminals, and did its homework by interviewing such murderers as Charles Manson and David Berkowitz (the Son of Sam). John Douglas, who worked for the FBI for 25 years, is an authority on the unit, and his book combines the best of nonfiction with that of a murder mystery.