The Giant Book of Sudoku X: 1000 Medium to Very Hard Puzzles

✓ Great gift for family, friends or work colleaguesThis Sudoku X book is packed with the following features: ① 1000 Sudoku X Puzzles from Medium to Very Hard (333 Medium - 334 Hard - 333 Very Hard).② Each puzzle is guaranteed to have only one solution.③ Answers to every puzzle are provided at the back of the book.④ Six puzzles per page (8.5 x 11 inches).

Playing Sudoku is not just a fun way to pass the time, due to its logical elements it has been found as a proven method of exercising and s...