The puzzle phenomenon keeps on growing with this collection of 150 puzzles that can be done in just a few minutes. Original.

Edited by legendary "New York Times" puzzlemaster Will Shortz, this collection features 100-all-new, extra easy Sudoku.

"New York Times" crossword puzzle editor Will Shortz delivers another collection of 150 simple, easy-to-complete Sudoku puzzles.

Once you've mastered the easy puzzles it's time to take it up a notch Includes: -200 medium-level puzzles -Perfect portable size -Edited by Will Shortz

Are you tough enough? Take on this collection of 200 devilishly difficult sudoku puzzles and find out! Includes: -200 hard puzzles -Perfect portable size -Edite