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)
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)