Who built Stonehenge, and why? Was the Voynich Manuscript - written in a script not even World War Two codebreakers could crack - just an elaborate hoax? When were the first crop circles reported, and why do they mostly appear in the UK? What can recent underwater archeological discoveries tell us about the fabled Lost City of Atlantis? The Orion Book of Unsolved Mysteries sifts through the evidence and conspiracies to provide an authoritative guide to the most inscrutable myths and phenomena of human history.