USA TODAY Sudoku X and Mini Sudoku: 200 Puzzles from The Nation's No. 1 Newspaper

You can be sitting in the train working a puzzle but it can take you far away from the everyday. Before you know it you're at your stop or about to pass it. It's not like you were even in the train. It's something different, something removed from the ordinary." --Maki Kaji, The Japanese Times

The Nation's No. 1 Newspaper offers puzzle-smiths the ultimate book featuring a new collection of challenging conundrums.

Sudoku X uses the familiar 9 x 9 grid, but includes an additional "X" space to solve, while Mini Sudoku offers a 6 x 6 grid that's perfect for early morning coffee or as an afternoon energizer.