Zodiac by Robert Graysmith
Fans of true crime books know how to appreciate a creative serial killer, and the Zodiac was most certainly that. The truth proved to be stranger than fiction when the elusive Zodiac killer first started taunting the public with his infamous coded messages intended to inspire confusion and fear. He was a brutal and ruthless yet intelligent killer who remains at large to this day.
This book was written by a man who was in the thick of the Zodiac investigation from the very start. Through his eyes the reader sees the mystery unravel one grisly murder at a time. The descriptions of violence in the book is the stuff of nightmares. It's really incredible when the description in the book effects you more than seeing the murder actually acted out in the film adaptation. The book does a perfect job of combining its investigation story with detailed and vivid descriptions of the Zodiac's various crimes and the many people involved.
I picked this book up at a Goodwill store, and once I started reading it I couldn't put it down. I literally read it in one day, and believe me that makes it something special. I highly recommend any fan of crime novels reality or fiction to check this book out.