Sudoku Medley is a book of 1000 original classic puzzles created and published by sudoku expert George Hoffman. Each puzzle is guarantied to have only a single solution. The book is divided into four levels of difficulty: easy, medium, difficult, and hard. To pack the most punch, the puzzles are sized at an efficient six grids per full-sized page. If you'd like a roomier puzzle, check out one of our large-puzzle books.