The Ultimate Logic Grid Puzzle Book for Adults, Volume 2: Another 100 Fun and Challenging Puzzles (Logic Puzzles – The Ultimate Collection) Unicorn Books
Chronicles of Logic: 40 Story-Based Logic Grid Puzzles for Adults: Brain Teasing Adventures to Solve With Deductive Reasoning, Logic and Skill Brain, Puzzling
Logic Grid Puzzles, Volume 4: 50 Fiendishly Hard Puzzles (Logic Puzzles for Adults – Platinum Collection) Unicorn Books