| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2013 | 978-1-909286-21-4 | Number 1!: Is the First to Help! (The Land of the Numbers) | |
| '' | 978-1-909286-40-5 | Number 0!: The Land of the Numbers Starts from Nothing! | |
| '' | 978-1-909286-51-1 | A Guide to Being a Role Model!: From the Series 'the Land of the Numbers' | |
| 2017 | 978-1-909286-81-8 | The Escape: The Gathering Part 2 | |