Enoch is good and I'm considering reading again. It talks alot about Fallen Angels, and Enoch visiting Heaven. I'm not sure if its the same Enoch mention in Genesis. But I believe personally that Enoch is one lost book that could possibly have some authority since we know it was very popularity scroll to the ancients and the number of copies that has been found. As many or more with books that we consider authority.
War Scroll is a hard read, but can be interseting. We only have parts of this book. If I got the story right its about a apocalyptic war between the Armies of Light and Armies of Darkness. I don't know if this is suppost to be same war mention in Revlations, I haven't read what scholars think of this book either. This is probably another that needs to be research indepth.
Community Rule is about laws and day to day regulations for the for a certian ancient group.