Math & Logic Problems for Beginners & Seasoned Puzzle Solvers – 8 Pack [Paperback] Penny Press/Dell Magazines Dell Puzzle Books
The Logic Puzzle Advent Calendar – Vol. 2 for Advanced Solvers: Challenging Christmas-Themed Logic Grid Puzzles for a Cozy and Fun-Filled Holiday (The Logic Puzzle Advent Collection) Books, Unicorn
Brain Games – To Go – Forensic Puzzles: Investigate Crime Puzzles – Match DNA and Fingerprints – Decode Clues – Figure Out Who Done It Brain Games, Publications International Ltd.