Mensa's Most Difficult Pattern Puzzles: Unl... by Mensa LTD Paperback / softback

Pocket Puzzles Crosswords (Pocket-siz... by Igloo Books Ltd Paperback / softback

The Mensa Number Puzzle Book: The World's T... by Mensa Ltd Paperback / softback

Mensa's Most Difficult Pattern Puzzles: U..., Mensa LTD

Mensa's Most Difficult Geometric Puzzles: Tricky puzzles to chal... by Mensa Ltd

Mensa's Most Difficult Pattern Puzzles: Unleash your by Mensa Ltd PAPERBACK

Mensas Most Difficult Geometric Puzzles: Tricky puzzles to challenge every angle