I do not have the Libre Pro, but from what I understand it is almost exactly like the Jetbook, which I do have. The Jetbook is a great ereader. It reads almost any format, including those pesky ADE library books. It is a wonderful reader. You should post your question in the Jetbook forum for answers from actual Libre Pro owners.
https://www.mobileread.com/forums/forumdisplay.php?f=205