Just received my Android tablet. It's already got Aldiko on it. I've managed to download a book, but how do I add books from my computer, my public library or the Kobo store? I have loaded them onto the tablet (I can see them in Windows Explorer on my computer) but how do I get them into Aldiko so I can see them on the shelf and read them? Through Explorer I can see folders for music, video and podcasts - so I presumeably just drag files into them, but there is no folder for books that I can see.