WORLD OF SUDOKU VOL # 1

Puzzles Heaven: 60 teasers for challenging your brain

WORLD OF SUDOKU VOL # 2

Road To Health Care

Sudoku Puzzle 25X25, Volume 5

Sudoku Samurai Puzzle, Volume 2

Professor Higgins's Problem Collection

Master Sudoku: Teach Yourself

200 Sudoku Puzzles (with solutions) - Book 2

Puzzles, Games, and Tricks: Understanding the Mystery and Magic of Numbers

Variety Puzzle Book for Adults Volume 3: Third time is the charm! Improve your Memory and Concentration (Word Search, Sudoku, Cryptograms, Mazes, Crosswords and Number Search)

The GCHQ Puzzle Book: Perfect for anyone who likes a good headscratcher

The Twelve Murders of Christmas

Around the World in 80 Games: A mathematician unlocks the secrets of the greatest games

Codebreaking: A Practical Guide

The Canterbury Puzzles