It would be nice if there was a way we could import, store, and read PDF documents inside Logos and have them appear in the Documents menu. I would NOT use this feature as a means to attempt to get free books I could otherwise purchase in Logos format. Rather, I would use this as an easier way to bring in articles I collect from my seminary library into Logos that would be more painful to attempt to convert to a Logos Personal Book and deal with cleaning up the tagging.
The ability to search the files, as well as possibly tag them with citation information so one could generate bibliographies off of them, would be handy as well.
All of this can be done in a citation manager such as Bookends, and I am testing out Bookends as we speak, but 99% of my school research is generally done through Logos, and I only sparingly dip into my seminary library to pull an article I flat cannot get in Logos format (if the book or journal is in Logos format, I always end up buying the book from Logos for the tighter integration). Being able to keep those handful of articles stored with the rest of my documents and include the citations inside my Logos bibs would be simpler than going out and using a second program to manage them.
Thanks!