Kakuro (also known as Cross Sums) is a logic puzzle, almost similar to the crossword, but uses numbers instead of words. This game is one of the most challenging puzzles in the market, even more than Sudoku.
Puzzles inside:
12 3x322 4x424 5x58 9x810 13x138 15x15Specifications:
Dimensions: 6" x 9"Softback, MatteHigh-Quality White Paper