Big Book of Killer Su Doku Book 1: a bumper killer sudoku book for adults containing 300 puzzles

A massive 300 killer sudoku puzzles packaged in a stylish paperback - this is the perfect killer sudoku gift book for adults of any age. With a mix of 100 easy, 100 medium and 100 hard puzzles, the 9 x 9 grids are each arranged on their own page and solutions are easily found in the back of the book. Printed in a highly portable format.