Logic Grid Puzzles, Volume 1: From Easy to Fiendishly Hard (Logic Puzzles for Adults – Platinum 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
Logic Grid Puzzles Triple Trouble: 150 Devilishly Fun Puzzles (3 Books in 1) (Logic Puzzles for Adults – Platinum Collection) Unicorn Books
The Ultimate Logic Grid Puzzle Book for Adults, Volume 3: 100 Fun and Extra Challenging Puzzles for Advanced Solvers (Logic Puzzles – The Ultimate Collection) Unicorn Books