Sudoku Solving Algorithm

The Million Word Crossword Dictionary

The Christmas Dinner Murder

Can YOU solve the puzzles in this festive murder mystery?

The Official Bletchley Park Puzzle Book

200 Sudoku Mix

A varied digital Sudoku collection from easy to extreme

Sudoku - 300 Hard Puzzles

A challenging digital Sudoku book with 300 hard puzzles and all solutions included

Sudoku - 300 Extreme Puzzles

A demanding digital Sudoku book with 300 extreme puzzles and all solutions included

Sudoku - 600 Mixed Puzzles

A large digital Sudoku collection with mixed difficulty levels and all solutions included

Sudoku - 300 Medium Puzzles

A modern digital Sudoku book with 300 medium puzzles and all solutions included

Sudoku - 300 Easy Puzzles

A modern digital Sudoku book for beginners with all solutions included

Sudoku - 600 Extreme Puzzles

Maximum Sudoku intensity for dedicated logic experts

Sudoku - 600 Hard Puzzles

Demanding Sudoku challenges for sharp and determined minds

Sudoku - 600 Medium Puzzles

Balanced number puzzles with a rewarding rise in difficulty

Sudoku - 600 Mixed Puzzles

Four difficulty levels combined across 600 varied Sudoku puzzles

Sudoku - 600 Easy Puzzles

600 easy Sudoku puzzles for peaceful breaks and steady focus

Cash Out the Killer

Cross Out 41,496 Casino Chips with 15 Clues to the Guilty Number, A Number Puzzle for Sudoku Lovers

So You Think You've Got Problems?

Surprising and rewarding puzzles to sharpen your mind

100 Hard Sudoku

A digital Sudoku puzzle book with 100 hard-level puzzles, solutions included, and a clear EPUB layout suitable for tablets, e-readers, smartphones and reading apps.

100 Extreme Sudoku

Tough challenges for experienced Sudoku experts

100 Easy Sudoku

Beginner-friendly puzzles for relaxing daily moments

100 Medium Sudoku

Balanced puzzles with just the right challenge

Master Sudoku

Teach Yourself

Mindbending Sudoku

Flash

Quick Sudoku

Flash

Why and How Sudoku in Schools

A Low-Tech Tool to Train Brain Gain