Will Shortz Presents Triple Threat Sudoku: 200 Hard Puzzles

Can't get enough sudoku?
Take on this collection of 200 devilishly difficult sudoku puzzles!

　　This book is the last in the series that began with Will Shortz Presents Single Scoop Sudoku and Will Shortz Presents Double Dip Sudoku.

Includes:
-200 hard puzzles
-Perfect portable size
-Edited by Will Shortz