Logic Puzzles & Brain Games for Adults: 500 Easy to Hard Puzzles & 12 Puzzle Types (Sudoku, Fillomino, Battleships, Calcudoku, Binary Puzzle, ... Numbrix): 4 (Challenging Fun Brain Teasers) Paperback – Import, 17 May 2020

Logic Puzzles & Brain Games for Adults: 500 Easy to Hard Puzzles & 12 Puzzle Types (Sudoku, Fillomino, Battleships, Calcudoku, Binary Puzzle, ... and Numbrix) (Challenging Fun Brain Teasers)

Ultimate Mind Games: With Over 400 Puzzles (Brain Busters)

The Ultimate Brain Health Puzzle Book for Adults: Crosswords, Sudoku, Cryptograms, Word Searches, and More! (Ultimate Brain Health Puzzle Books)