- The Giant Book of IQ Puzzles
- Penguin Pocket Sudoku
- The Penguin Sudoku Challenge: Volume 1
- Penguin Sudoku 2006: A Year's Supply of Sudokus and Some Nonograms and Cross Sums, the Fiendish New Japanese Puzzles
- The Riddles of the Sphinx: . . . and the puzzles, word games, brainteasers, conundrums, maps, mysteries, codes and ciphers that have baffled, entertained and confused the world





























