Pocket Sudoku - a compact & travel-friendly puzzle book: only 4 x 6 inches in size | 5 Difficulty Levels | easy - normal - hard - very hard - extreme | 150+ Grids With Answers At The Back

I have been doing it every morning and it provides easy, normal, hard and extreme hard. From my experience, after easy section, difficulty level seems just random.

Small, easy to carry around, my favorite game.

On top of being a good range of difficulties, this can easily fit into a purse or pocket. Sometimes I'll also just chuck it into my glovebox, or just keep it at my desk, and it doesn't take up a metric ton of room for those spaces I would like to have other things as well. Could not recommend it enough if you like sudoku.

Excellent product

I love Sudoku’ keep my mind relax. I am glad I could find a small size that fits my handbag, mostly important I won’t get bore on the airplane:)

No complaints. Perfect size for on-the-go and feels nice.

It Actually Fits In Your Pocket!!!!!!!!Is a good book that anyone can pick up and have a challenging puzzle not matter what your skill level.Puzzle is big enough to write in corders and not too close to the seem so your not trying to write in the seems. only wish their were more puzzles but then it wouldnt fit in a pocket.

Just so you know the level of sudoku is not entirely dependent on how many blanks there are left, the first easy sudoku requires taking drafts to solve.