¿ ¿ ¿ The SUDOKU 16x16 Puzzle Book Challenge by Yoshi Sakamoto will help you sharpen the mind in a fun way. Put your brain to the test with this puzzle book. ¿ ¿ ¿Makes a great gift for all sudoku fans! The SUDOKU 16x16 Puzzle Book Challenge features:50 Sudoku HARD puzzlesSolutions included for every puzzle at the back of the bookPlenty of white space for number scribbling16x16 puzzle Large print: 8.5" x 11"Great matte finish cover104 pagesPaperback ¿¿¿ALWAYS in Stock ¿¿¿ Order this book today as a special gift for family, friends or work colleagues.