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 4: 50 Fiendishly Hard Puzzles (Logic Puzzles for Adults – Platinum 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
The Logic Puzzle Advent Calendar: Puzzle Book for Adults with Christmas-Themed Logic Grid Puzzles from Medium to Near Impossible (The Logic Puzzle Advent Collection) Unicorn Books