Townsend, Charles Barry. Merlin's big book of puzzles, games and magic / Charles Barry Townsend. - New York : Book-of-the Month-Club, 2000. - 282 p. : ill. ; 27 cm. - 794.5 (NLA) . Subjects--Topical Terms: Games.Mathematical recreations. Puzzles. Universal Decimal Class. No.: 794.5 (NLA)