- Observe and Memorize: Improve Your Mind with Sniper Observation and Memory Training Kim's Game Memorization Practice Book
- 99 Large & Challenging Maze puzzles: 99 large and challenging mazes with solutions.
- 200 relaxing Maze puzzles
- Dungeon Builder: Dungeon Maker with 50 Premade Dungeon Maps for Tabletop Roleplaying Games.
- Dungeon Builder: Dungeon Maker with 50 Premade Dungeon Maps for Tabletop Roleplaying Games (Volume 2)