- The Midnight Sun Matter - Billy Hatcher Mysteries: Cryptogram Puzzle Books - Murder Mystery Puzzle Book
- The No Matter Matter - Billy Hatcher Mysteries Cryptogram: Enjoy Who Done It Murder Mysteries? You'll Love this Large Print Who Done It Puzzle Book (Cryptogram)
- The Missing Miss Matter - Billy Hatcher Mysteries: Cryptogram Puzzle Books - Murder Mystery Puzzle Book
- The Crafty Chemist Matter - Billy Hatcher Mysteries - Cryptogram: Cryptogram puzzle books for adults - Murder Mystery Puzzle Book
- The Replicant Affair - Des Hatcher Tales from Tomorrow Cryptogram: cryptograms puzzle books for adults and Sci Fi Lovers Cryptography Puzzles