The Bumper Book of Things That Nobody Knows: 1001 Mysteries of Life, the Universe and EverythingWilliam Hartston
A Brief History of Puzzles: 120 of the World's Most Baffling Brainteasers from the Sphinx to SudokuWilliam Hartston
Even More Things That Nobody Knows: 501 Further Mysteries of Life, the Universe and EverythingWilliam Hartston