Logic Grid Puzzles, Volume 3: From Easy to Fiendishly Hard (Logic Puzzles for Adults – Platinum Collection) Unicorn Books
Logic Grid Puzzles Triple Trouble: 150 Devilishly Fun Puzzles (3 Books in 1) (Logic Puzzles for Adults – Platinum Collection) Unicorn Books
Logic Grid Puzzles, Volume 2: From Easy to Fiendishly Hard (Logic Puzzles for Adults – Platinum Collection) Unicorn Books
Logic Grid Puzzles & Other Games: A Fun and Challenging Logic Workbook for Kids 8-12 (Logic Games for Smart Kids) Unicorn Books