Will Shortz Presents Daring Sudoku 200 Harder Puzzles (Paperback)

From the Publisher: This second book in the series is for savvy sudoku solvers who are looking for puzzles that are harder than hard.   Features:|· 200 fearsome puzzles|· Edited by legendary New York Times crossword editor Will Shortz|· Portable and affordable package   Also in the series: -Will Shortz Presents Difficult Sudoku -Will Shortz Presents Dangerous Sudoku