Will Shortz Presents Simply Sinister Sudoku : 200 Hard Puzzles, Paperback by Shortz, Will (EDT), ISBN 0312541635, ISBN-13 9780312541637, Brand New, Free shipping in the US

<p><b>Are you tough enough?</b> <br>Take on this collection of 200 devilishly difficult sudoku puzzles and find out!<br><br>Includes: <br>-200 hard puzzles<br>-Perfect portable size<br>-Edited by Will Shortz</p>