The Ultimate Logic Grid Puzzle Book for Adults, Volume 4 – Extreme Edition: 100 Fiendishly Fun and Creative Puzzles for Passionate Solvers (Logic Puzzles – The Ultimate Collection) Books, Unicorn
Murder Mystery Logic Grid Puzzles: 75+ Puzzles, 20 Separate Cases to Solve (Murder Mystery Puzzle Case Files) Bonty, Books, McGee, Zips