When rotating the iPad, a translation website opens (site is looking somehow inclompete or corrupted) instead of rotating the book page. Additionally I haven't found a way to get back from this site to the book view or the start/search page
Thank you for bringing this bug to our attention. It has been fixed. Please close the app (if it is currently running) and restart it. You can click the home button (on the top left of the screen) to return to the search page.