The Logic Puzzle Advent Calendar – Vol. 2 for Advanced Solvers: Challenging Christmas-Themed Logic Grid Puzzles for a Cozy and Fun-Filled Holiday (The Logic Puzzle Advent Collection) Books, Unicorn
The Ultimate Logic Grid Puzzle Book for Adults: 100 Fun Deductive Challenges (Kindle Scribe Only) (Logic Puzzles – The Ultimate Collection 1) Books, Unicorn
Variety Logic Puzzles for Adults (Kindle Scribe Only): A Fun and Challenging Activity Book to Test Your Wits with Logic Grids, Battleships, Skyscrapers, and Minesweepers Books, Unicorn