If the application has been uninstalled, you'll have to find it again on google play and reinstall it, the most likely app I can find to that name is here
I suggest trying to find the right app you're looking for and install it again! If it's the same program and it stored books on your device locally, and they were not removed, the books should still be there when you reinstall the program. However, if it was removed normally then usually any associated data (such as downloaded books) will be gone as well.
Answers & Comments
If the application has been uninstalled, you'll have to find it again on google play and reinstall it, the most likely app I can find to that name is here
I suggest trying to find the right app you're looking for and install it again! If it's the same program and it stored books on your device locally, and they were not removed, the books should still be there when you reinstall the program. However, if it was removed normally then usually any associated data (such as downloaded books) will be gone as well.