ok, I just found some posts on the same issue and have followed all the advice but all my books are still going to docs -
1. I have re-run the setup wizard and not put any email details in, so my books are not getting sent by email
2. I have gone to preferences, output, mobi and in the Personal Doc Tag I have put EBOK
3. I have gone to Device, Configure this defice and deleted Docs from the list of folders and also created a rule to send MOBI to Books
4. I have also tried converting the file again to MOBI before sending it to device
None of this has worked. Are there any other suggestions?