The Mystery of the Crystal Skulls: Unlocking the Secrets of the Past, Present, and Future by Chris Morton and Ceri Louise Thomas.
Native American Legend tells of thirteen life-size crystal skulls said to contain crucial information about humankind's purpose and destiny. The legend prophesied that at a time of great crisis for humanity, all of the crystal skulls would be rediscovered and brought together to reveal information vital to the very survival of the human race. The authors first heard of this legend while in the jungles of Central America and, after a real crystal skull was discovered in a Mayan city, set out on a quest to discover the truth behind this mystery.