Sudoku Solving Algorithm

The Million Word Crossword Dictionary

So You Think You've Got Problems?

Surprising and rewarding puzzles to sharpen your mind

Master Sudoku

Teach Yourself

Mindbending Sudoku

Flash

Quick Sudoku

Flash

Why and How Sudoku in Schools

A Low-Tech Tool to Train Brain Gain

The Penguin Book of Puzzles

Solve these wonderfully perplexing logic puzzles

The Sun Pub Quiz

4000 quiz questions and answers

Rod'S Sudoku Tutorial

Solve Extreme Sudoku

Strategies for Easy to Hard Puzzles

Mindbenders and Brainteasers

100 Maddening Mindbenders and Curious Conundrums

Mathemagic Puzzles And Brain Drainers

Puzzles and brain games to keep your mind sharp and refreshed

Road To Health Care

All that you need to stay fit & healthy

Puzzles, Games, and Tricks

Understanding the Mystery and Magic of Numbers

Brain Games

Brain Teasers, Logic Tests, and Puzzles to Exercise Your Mind

Vintage Games with Letters and Numbers

The GCHQ Puzzle Book

Perfect for anyone who likes a good headscratcher

The Canterbury Puzzles

The Penguin Book Quiz

From The Very Hungry Caterpillar to Ulysses - The Perfect Gift for Book Lovers!

Today Programme Puzzle Book

The puzzle book of 2018

The GCHQ Puzzle Book II

Solve more than 100 brilliant brainteasers

The Ultimate Mathematical Challenge

Over 365 puzzles to test your wits and excite your mind

Population Explosion And Other Mathematical Puzzles, The

MODUS FORTIS Sudoku Logic, Sudoku Reason