Using ADE Android App with Open Library

Hi: I have a Samsung Galaxy tablet on which I've downloaded the ADE app for Android. I can download and thereby "borrow" books from openlibrary.org this way. In general, it works great. The problem is that there's no way to return books to the library from the app. The regular ADE program on my Macbook has this feature and works fine, but it can't return things downloaded on the tablet. So I'm basically stuck with each book I download until the 2 weeks are up, even if I'm done reading. I may be missing something but as far as I can tell Adobe didn't bother to add this feature to the app. Any ideas?