Introducing a new idea in Sudoku, and it starts with travel: Sudoku to Go! is a collection of three slim notepads, each the perfect size to stick in a pocket or bag, light enough that you wouldn't eve
Our hardest-yet Sudoku collection, handcrafted by the puzzle masters at Nikoli in Japan (whose Workman Sudoku books have 1.3 million copies in print combined).Warning:Not for the Sudoku faint-of-heart
