It can be done. Says so, right here.
A self-published author of an e-book (no hard copy) wanted to test the waters with her work. Seems like the water was just fine for her. Surely there's a tip or two in here for the rest of us. Leaving Lukens is available for e-book readers as well as in paperback, and so far, the response from reviewers and readers alike is positive, wonderful "better than your first" kind of stuff.
Now, if you haven't finished all your Christmas shopping yet, I invite you to try out a low-cost option, and buy my e-book (Leaving Lukens) for your favorite person -- or yourself. I'd be happy to autograph a paperback copy, but if Kindle's your thing, go for it. Please, and Thank You.