Mensa(r) Aarp(r) Challenging Brain Twisters: 100 Logic and Number PuzzlesFred Coughlin, American MensaHäftad, 2020239 kr
Massive Book of Mensa® Puzzles (4 Books in 1!)David Millar, Fred Coughlin, American MensaHäftad, 2024279 kr
Mensa(r) Aarp(r) Challenging Brain Twisters: 100 Logic and Number PuzzlesFred Coughlin, American MensaHäftad, 2020239 kr
Massive Book of Mensa® Puzzles (4 Books in 1!)David Millar, Fred Coughlin, American MensaHäftad, 2024279 kr