[Renate]

There's no reason you can't use your own library app in parallel with the stock library app. I use my own library app. It displays as a list of single lines. When I'm looking for a book I just have to filter by a few letters to find title or author. Your needs may be different.

Some Boox are USB 3 (Poke3), some are USB 2 (Poke5). But it any case they should all be faster. How are you syncing? I use (my own) adbsync.exe and I would expect less than a minute for 200 books.