Hi, all, I got on the computer and deleted the file that was possibly causing a problem with the thumb drive my downloaded books were on, and I deleted a file that was on the drive I didn't want any. I then began downloading files from another source from which I get books, and I got an error message. When I went to check that out, lo and behold, praise the Lord, all my books were there!!!!!!!!m all 170 files including a few word processing files from my computer that I had there. I'm tickled. Thanks to everybody who gave advice. I'm glad to have my books back. Have a blessed day.