1,000 + Big killer sudoku 6x6: Logic puzzles extreme levels

Positive brain game. Suitable for adults and children. 6 puzzles per page. 1002 killer sudoku puzzles extreme levels. 8.5" X 11" Book. (215.9mm X 279.4mm). Thick paper. Glossy cover. Killer sudoku may be called or searched with the following phrases or names: sumoku puzzle book, daily killer, how to solve killer sudoku, how to play killer sudoku, sudoku sudoku sudoku, how to do killer sudoku, sudoku game extreme, krazydad killer, sodoku knacker, multi sudoku puzzles, easy sudoku games, mega...