Paul Sloane studied engineering at Cambridge University and works in software marketing. His passion for lateral puzzles started when he met a dwarf standing on a block of ice in an elevator. His first book, Lateral Thinking Puzzlers, was published by Sterling in 1991, and has gone on to become a best seller.
Des MacHale is Associate Professor of Mathematics at University College in Cork. He is the author of over 40 books, including one on the John Ford cult film The Quiet Man and another on George Boole of Boolean algebra fame.