Logic Grid Puzzles, Volume 1: From Easy to Fiendishly Hard (Logic Puzzles for Adults – Platinum Collection) Unicorn Books
The Ultimate Logic Grid Puzzle Book for Adults: 100 Fun and Challenging Puzzles (Logic Puzzles – The Ultimate Collection) Unicorn Books
The Ultimate Logic Grid Puzzle Book for Adults, Volume 2: Another 100 Fun and Challenging Puzzles (Logic Puzzles – The Ultimate Collection) Unicorn Books
Logic Grid Puzzles, Volume 3: From Easy to Fiendishly Hard (Logic Puzzles for Adults – Platinum Collection) Unicorn Books