Bad, bad bad

Loved the app at first. I use it for medical textbooks. Heres the rub - each time the ipad restarts or the app updates, it deletes all my books from the app. Support says simply redownload the books. Theyre big (500 Mb), so would like to do it over wifi, which isnt always readily available. Which would be workable if the $);:/)&@ things would download. I can get a book to download about 50% of the time! at which point app freezes. Then I have to restart my ipad. Which deletes any books I have managed to successfully download. Ugh.

U/54:()342 about eBooks by Inkling, v3.9.6