97 books in 36 series. Most series come in several difficulty levels, so pick the level that suits you. Every button opens the book in your local Amazon store.
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Very Hard and Extreme only. No easy pages.
500 full-size 9x9 Calcudoku for solvers who have outgrown small newspaper grids. Every cage needs real arithmetic and sharp logic, and the pressure never lets up from the first page to the last.
Full 9x9 maths puzzles, at the level that suits you.
Calcudoku, also called Mathdoku, blends Sudoku logic with + − × ÷. Each book packs 600 full-size 9x9 puzzles across three rising levels: a real step up from the small 4x4 and 6x6 grids in newspapers.
Sudoku on a triangle. Same logic, fresh shape.
If square grids have started to feel routine, Tridoku gives your Sudoku skills a new playground. 600 triangular puzzles per book, graded in order so the challenge keeps building.
200 tough Hashi puzzles, up to giant 30x30 grids.
Connect the islands, never cross a bridge. Simple rules, deeply satisfying solves and no maths needed. Grids grow from 12x12 to 30x30 as you go, with the rules at the front and every solution in the back.
Extra-large Numbrix grids for a longer, richer solve.
Link the numbers in one unbroken path, moving up, down, left and right. Bigger grids mean longer chains to trace and more to think about, with 270 puzzles per book in three difficulty ranges.
500+ Hard and Very Hard Sudoku. No warm-ups.
Made for solvers who finish ordinary Sudoku books in an afternoon. Every puzzle is rated Hard or Very Hard, so the real challenge starts on page one.
Five grids, one puzzle. 200 Hard and Very Hard.
Samurai Sudoku joins five 9x9 grids at the corners, so one placement can ripple across the whole puzzle. 200 Hard to Very Hard puzzles for experienced solvers who want a long, absorbing solve.
Mastered 9x9? Step up to 16x16.
200 Mega Sudoku using the numbers 1 to 16, with 256 squares to fill and no easy puzzles at all: 100 Hard and 100 Very Hard. Two puzzles per page, rules at the front and solutions in the back.
12 kinds of merged Sudoku in every book.
Samurai, Sohei, Butterfly, Flower and more: overlapping grids that make you think across the whole puzzle. Pick a single level from Easy to Extreme, or the Easy to Extreme book for a mix.
12 merged Sudoku variants that build as you go.
Overlapping-grid puzzles including Samurai, Sohei, Butterfly and Flower, with 252 per book spread across three rising levels so your skills grow page by page.
1,500 puzzles: Sudoku plus four clever twists.
Sudoku X, Windoku, Asterisk and Center Dot each add one extra rule to classic Sudoku. Plenty of variety to keep things fresh, and months of solving in a single book.
Six kinds of Killer Sudoku, 1,000+ puzzles.
Killer Sudoku on 8x8, 9x9, 10x10 and 12x12 grids, plus Killer X and Killer Windoku. Every cage must add up to its total with no repeats: arithmetic and logic together, with variety to last for months.
1,000 Sudoku with irregular, jigsaw-shaped boxes.
Jigsaw Sudoku swaps the familiar 3x3 boxes for irregular shapes, so your usual shortcuts stop working and you have to think afresh. 1,000 9x9 puzzles per book, with solutions.
Six grid sizes, from quick 6x6 to giant 16x16.
Warm up on a 6x6, then work up through 8x8, 10x10, 12x12 and 15x15 to the full 16x16. 900 puzzles per book, and a change of pace whenever you want one.
2,000 puzzles per book. Years of solving.
At one puzzle a day, a single book lasts more than five years. Classic 9x9 Sudoku graded in order, with every solution printed in the back. The grids are compact (12 per page); for big grids, see our Large Print Sudoku.
300 Mega Sudoku on big 16x16 grids.
256 squares and sixteen 4x4 boxes: Sudoku for when 9x9 feels too quick. Each book holds 300 puzzles in three rising difficulty ranges.
10 brain-teasing Sudoku variants in one book.
Each variant adds its own twist to the rules, so just as you master one style, the next makes you rethink. 600 puzzles per book, in three levels from Novice to Master.
2,000 Extreme Sudoku. Nothing easier.
The ultimate test for expert solvers: every puzzle needs advanced techniques, from the first page to the last. Compact grids, 12 per page, and all 2,000 solutions printed in the back.
Sudoku variants in a travel-friendly size.
Compact enough for a bag or coat pocket, and ideal for trains, planes and waiting rooms. 180 puzzles per book mixing classic Sudoku, Sudoku X and Windoku, in four difficulty ranges.
Classic Sudoku that fits in your pocket.
240 puzzles in a compact, travel-friendly book, perfect for commutes, holidays and waiting rooms. Choose your level, or take Easy to Extreme for a bit of everything.
Killer Sudoku to go.
240 Killer Sudoku in a compact, travel-friendly size: cages, sums and logic wherever you are. Choose your level, or take Easy to Extreme for a bit of everything.
Calcudoku in a travel-friendly size.
240 maths-and-logic puzzles in a compact book that slips into a bag. Ideal for holidays and journeys, with four difficulty ranges including Easy to Extreme.
Number search with a twist, in large print.
The numbers don't just run in straight lines: they snake around the grid. A relaxing, low-pressure puzzle for winding down, with 260 large-print puzzles.
100 word searches from the world of butterflies.
A relaxing themed word search for nature lovers, with butterflies from around the world. A calm, screen-free break, and a lovely gift.
400 tough Futoshiki for experienced solvers.
Futoshiki (also called Inequality or More or Less) is a Latin square steered by greater-than and less-than signs. These are the hard ones: 400 puzzles that reward careful chains of reasoning.
600 Futoshiki, graded to match your skills.
Fill each row and column once and keep every inequality sign true. Simple rules, surprisingly deep logic, and 600 puzzles per book in three rising levels.
Number-path puzzles in playful shapes.
Hidoku (also called Hidato or Number Snake) links every number in one continuous chain, and here the grids come in fun shapes instead of plain squares. 288 puzzles per book, in three levels.
