| title | media type | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|---|
| A Haunted Halloween | Paperback | 978-1-4814-3490-4 | 2015 | Ray O'Ryan |
| A Haunted Halloween | Hardcover | 978-1-4814-3491-1 | 2015 | " |
| Galaxy Zack 3 Books in 1!: Hello, Nebulon!; Journey to Juno; The Prehistoric Planet | Paperback | 978-1-4814-5641-8 | 2015 | " |
| Galaxy Zack 3-pack: Hello, Nebulon!; Journey to Juno; The Prehistoric Planet | " | 978-1-4814-2844-6 | 2014 | " |
| Operation Twin Trouble | " | 978-1-4814-4399-9 | 2015 | " |
| Operation Twin Trouble | Hardcover | 978-1-4814-4400-2 | 2015 | " |
| Operation Twin Trouble | Digital | 978-1-4814-4401-9 | 2015 | " |
| Return to Earth! | Paperback | 978-1-4814-2181-2 | 2015 | " |
| Return to Earth! | Hardcover | 978-1-4814-2182-9 | 2015 | " |
| Science Fair Disaster! | Paperback | 978-1-4814-5876-4 | 2016 | " |
| Science Fair Disaster! | Hardcover | 978-1-4814-5877-1 | 2016 | " |