I've got quite a few ebooks too, like "Turn Left at Orion" and a couple of moon atlases (I also have real moon atlases, but not the super expensive ones, which I only have in digital format), but I still prefer real books. I must write a list of the books I have one of these days. I wouldn't have bought so many real books of course if they hadn't been incredible bargains, as I said. I like to go to book sales (for example the one at the Sydney Uni in September), and they have incredible bargains. Wonderful astronomy books for less than $5 each, some looking really like new.
Anyway, Billi, if you have the chance to have a look at a second-hand bookshop or a book sale, give it a go.