I installed the FBreader app and it sees books when they are in the Books directory, whereas the normal destination for 'send to device' is Documents.
I tried 'save to disk'. but it can't find the device when I try and set where to send the book(s).
I tried setting a rule for epubs in 'configure device'. But it set all types to go there, not just epubs.
I can drag & drop them one at a time. Yuk!