When I saw that there was an e-book, I was honestly disappointed there wasn't an actual physical book I could buy instead--this was actually the first thing I looked for. Call me old-fashioned, but I like reading to be with an actual book. That and it looks cool on the shelf, and then people can wonder what it is, and pick it up and read it, and ask questions, and I can recruit them
That and I don't really own an e-reader. I'm sure my cell is large enough with it's 4.3 inch (10.92 cm) screen, and I could read it on my computer but... Still like books to be actual books.