thanks for the suggestions - the books don't say secured or anything similar. I downloaded Calibre and ran them through it, and I'm still having the same problem. They are readable on my computer in the reader software or in the calibre program, and they transfer to my reader and show up in the book list, but when I try to open them in the reader it just says "page error!" Any other suggestions? worst case, i guess I can just read them on the computer...