I have just run into the 1000 books dropbox issue.
I appreciate from the previous comments that this is externally imposed, but i wonder if i can do anything to ensure which 1000 books from dropbox are picked. Perhaps placing them in the dropbox root directory rather than further in?
I appreciate i can reverse the process and go to a single book in Dropbox and ask it be opened in Marvin. This give a problem with the particular book as Marvin insists it is already in the library but i cannot seem to find it.