Sudoku & Number Puzzles

The Times Big Book of Ultimate Killer Su Doku book 3 : 360 of the Deadliest Su Doku Puzzles

HarperCollins Publishers

Maths Tricks to Blow Your Mind : A Journey Through Viral Maths

Atlantic Books

The Healthy Brain Book of Sudoku Variants

Sterling Publishing Co Inc

The Great Big Indoors Family Puzzle Book

Quercus Publishing

Mensa's Most Difficult Number Puzzles : Prove your logical and numerical abilities against 200 fiendish problems

Welbeck Publishing Group

Vintage Sudoku : 150 Puzzles

Princeton Architectural Press

The Ordnance Survey Puzzle Book: Legends and Landmarks

Orion Publishing Co