I just tried dragging a purchased book to Finder, and it only gives me a .webloc pointing to the book's store URL. On the other hand, if I manually locate the

I just tried dragging a purchased book to Finder, and it only gives me a .webloc pointing to the book's store URL. On the other hand, if I manually locate the book in ~/Library/Containers/com.apple.BKAgentService/Data/Documents/iBooks/Books, it appears to just be an (unzipped) ePub without any encryption.