The Ninebloom Sudoku Collection

Volume 1: the ten books

Book 1: Beginner Sudoku, Volume 1

Your first 120: every step a single. 120 gentle Sudoku puzzles where every next step is a single: the best way to learn. $4.99.

Book 2: Easy Sudoku, Volume 1

Singles, hidden and naked, at an easy pace. 120 easy Sudoku puzzles: singles only, never a guess, for a relaxing daily solve. $4.99.

Book 3: Medium Sudoku, Volume 1

Pairs and pointing: where pencil marks start to matter. 120 medium Sudoku puzzles where pencil marks and pairs start to pay off. $4.99.

Book 4: Hard Sudoku, Volume 1

Box/line reductions and triples. 120 genuinely hard Sudoku puzzles, rated by the techniques they need. $4.99.

Book 5: Expert Sudoku, Volume 1

X-Wings for the seasoned solver. 120 expert Sudoku puzzles, every one needing an X-Wing. $4.99.

Book 6: Fiendish Sudoku, Volume 1

Beyond the textbook: bring patience. 120 fiendish Sudoku puzzles that go beyond every textbook technique. $4.99.

Book 7: Killer Sudoku, Volume 1

Cages and sums, easy to hard. 120 Killer Sudoku puzzles, from easy to hard: cages, sums and few or no starting numbers. $4.99.

Book 8: Jigsaw Sudoku, Volume 1

Odd-shaped regions instead of boxes, easy to hard. 120 Jigsaw Sudoku puzzles, from easy to hard, with odd-shaped regions instead of boxes. $4.99.

Book 9: Diagonal Sudoku, Volume 1

Both long diagonals count too, easy to hard. 120 Diagonal Sudoku puzzles, from easy to hard: both long diagonals hold 1 to 9 too. $4.99.

Book 10: Mini Sudoku 6×6, Volume 1

Six by six: quick, friendly, fun for kids too. 120 Mini 6×6 Sudoku puzzles: quick, friendly and perfect for beginners and children. $4.99.

Save with a trio, $11.99 instead of $14.97:

• The Sudoku Starter Trio, Volume 1 ($11.99): Beginner Sudoku, Easy Sudoku, Medium Sudoku. Beginner, Easy and Medium: from your very first grid to your first pencil-mark pairs.
• The Sudoku Challenge Trio, Volume 1 ($11.99): Hard Sudoku, Expert Sudoku, Fiendish Sudoku. Hard, Expert and Fiendish: 360 puzzles for solvers who want to be stretched.
• The Sudoku Variety Trio, Volume 1 ($11.99): Killer Sudoku, Jigsaw Sudoku, Diagonal Sudoku. Killer, Jigsaw and Diagonal: three new sets of rules, each from easy to hard.

Or take them all: The Complete Ninebloom Sudoku Set, Volume 1, ten books and 1,200 puzzles for $29.99.

Which level should I start with?

• Beginner needs naked singles only: there is always a square with just one possible number.
• Easy needs naked and hidden singles: look for the one square in a row, column or box where a number fits.
• Medium needs singles plus naked pairs and pointing pairs, so pencil marks start to pay off.
• Hard needs everything in Medium plus box/line reduction and naked triples.
• Expert needs X-Wing as well as everything in Hard.
• Fiendish needs more than every technique in Expert: chains, colouring or a careful trial.

New to Sudoku? Start with Beginner or Mini 6×6. If Medium feels like work, Hard will feel like a wall; if Hard feels comfortable, try Expert or one of the variants. Not sure? The free sampler has one puzzle from every book.

Rated by technique, not by clue count

Most puzzle books grade difficulty by how many numbers are missing, which is why an “easy” puzzle sometimes needs a guess. These puzzles were made and checked by Ninebloom’s solver, which solves like a person and rates each puzzle by the hardest technique it needs. Every one has exactly one solution, and none of them is in the app’s own puzzle lists: they are printed here for the first time.

Stuck? Play it in Ninebloom

These puzzles were made and checked by Ninebloom, our Sudoku app for Android, and rated the same way: by the techniques a puzzle needs, not by how many numbers are missing. Every classic puzzle in the books has a small QR code beside it; scan it and the same puzzle opens in the app, where a hint names the technique that cracks the next square and shows you why. Get Ninebloom on Google Play (free, no account needed) or read more at ninebloom.leafyorb.com.

What every book includes

• 120 puzzles, two to a page, each with its level and a time box
• A 4-inch grid with squares big enough for pencil marks
• How to play, and what each level needs
• Every solution at the back, starting numbers in bold
• US Letter (8.5 × 11 in) and A4 (210 × 297 mm) PDFs
• A personal-use license: print as many copies as you like for yourself, your family or your classroom

Questions about the collection

Do I need the app?

No. The books are complete on paper, with every solution. The app is there if you want a hint that explains the next step.

Are the puzzles also in the app?

No. They come from the same generator but are new, checked against every puzzle the app ships so none repeat. The QR codes open the book’s puzzle in the app as a typed-in grid.

Will there be more volumes?

Yes. New volumes are added to this collection, and no puzzle is ever repeated from one volume to the next.

Do I get a physical book?

No, these are PDF downloads you print yourself, at home or at a print shop. The links arrive straight after checkout.