Suko - A puzzle patterned after Sudoku with nearly the same rules but with a little added spice--simple addition challenges. Suko is sure to charge up your neurons and get your synapses snapping. Very popular in the United Kingdom, it is now finding a following in the United States. If you're a fan of Sudoku, you will probably love the Suko challenge and enjoy the satisfaction of solving these puzzles. If you haven't yet tried sudoku, there is no problem starting with Suko. Our book offers puzzles from easy to challenging. Large print and space to work are features of the book.