Please make sure your Pubu App has been updated to the latest version.
If you still have a problem reading eBooks, try the following steps:
- Open App switcher and close all background Apps except Pubu to save memory space.
- Go back to Pubu and tap Sidemenu, My Content, long press the product cover for about 2 seconds.
- Tap the trash can at the bottom, choose Clean Storage Space of Books.
- Go back to My Content again.
- Tap the product cover to re-download and read again.