Steps to reproduce:
- Go to book in read-mode
- Page back or forward
- Go offline while still in read-mode
- Page back or forward a few pages
- App crashed
This also happened when going offline then trying to use the Back-button to get out of the book.
The main criteria seems to be that you need to be online, do some paging, then go offline and try to do more paging.
Only confirmed in Android, on latest release Gregory O'neill [X] put on our QA Samsung phone.