99 6×9 Puzzles | Cryptogram Edition: Survival Skills: Adventure Theme Puzzle Book for Teens, Adults, and Seniors Books, Zoe & Sierra
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
Summer Logic Grid Puzzles for Adults: Fun, Season-Themed Challenges to Stretch Your Mind Books, Unicorn