Will Shortz Presents Fascinatingly Fierce 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 Ferociously Fun Sudoku and Will Shortz Presents Fearsomely Frightful Sudoku.

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