The #100 Sudoku Challenge Puzzle by Yoshi Sakamoto will help you sharpen the mind in a fun way. It includes warm-up to challenging. Put your brain to the test with this puzzle book. Makes a great gift for all sudoku fans! The #100 SUDOKU Challenge features: 100 Sudoku puzzle Variety of levels: Medium and Hard Solutions included for every puzzle at the back of the book Plenty of white space for number scribbling 9x9 puzzle Large print: 8.5" x 11" Great matte finish cover 128 pages Paperback ALWAYS in Stock Order this book today as a special gift for family, friends or work colleagues.