LOL. even worse I ended up doing a hard reset and then when I tried to authorise Digital Editions it wouldn't do it as I had too many activations. Apparently a known issue since mid August but Adobe have no fix for it, so now I can't read any of the ePubs I bought ! not buying any more DE books from now on.
IF you download the html tor books they convert great and will not freeze the reader or Calibre
Nice we can resort to Calibre when we need it