Will Shortz Presents Terrifying Sudoku: The Hardest Puzzles, featuring two hundred of the most devious sudoku puzzles ever created! This volume includes:· 200 mind-melting sudoku puzzles to solve!· Edited by legendary New York Times crossword editor Will Shortz· Portable and affordable package-perfect for solving on the go! | Will Shortz Presents Terrifying Sudoku, Paperback | Indigo Chapters