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 puzzleVariety of levels: Medium and HardSolutions included for every puzzle at the back of the bookPlenty of white space for number scribbling9x9 puzzle Large print: 8.5" x 11"Great matte finish cover128 pagesPaperback ALWAYS in Stock Order this book today as a special gift for family, friends or work colleagues.