ISBN-13: 9780312541637 / Angielski / Miękka / 2009 / 320 str.
ISBN-13: 9780312541637 / Angielski / Miękka / 2009 / 320 str.
Are you tough enough?
Take on this collection of 200 devilishly difficult sudoku puzzles and find out Includes:
-200 hard puzzles
-Perfect portable size
-Edited by Will Shortz