The Ultimate Brain Health Logic Puzzle Book for Adults: Sudoku, Calcudoku, Logic Grids, Cryptic Puzzles, and More! (Ultimate Brain Health Puzzle Books) Danesi, Marcel
The 125 Best Brain Teasers of All Time: A Mind-Blowing Challenge of Math, Logic, and Wordplay Danesi, Marcel
The Ultimate Brain Health Puzzle Book for Adults, Vol. 2: Even More Crosswords, Sudoku, Cryptograms, Word Searches, Logic Grids, and Calcudoku Puzzles! (Ultimate Brain Health Puzzle Books) Danesi, Marcel
The Ultimate Book of Mixed Puzzles: More than 450 Puzzles for Adults Including Word Searches, Crosswords, Sudoku, Mazes and More! (Part of the Brain Busters Puzzle Collection) Parragon Books