Please send database file to support via email.
Please follow the steps to get database file:
1. Plug the device into PC / Mac
2. Use iTunes to connect to the device
3. Select "Apps"
4. Go to "File Sharing"
5. Select "Creative Book Builder"
6. Find and select the file "CreativeBookBuilderDB.sqlite"
7. Tap "Save to.."
We will try to recover data.
We will delete database file after fixing the issues.
If you have full backup on iTunes recently, you can also try to restore from it.