I've had a chance to look through the e-book (preview copy only) of The Raven's Seal. It's a wonderful, strange thing for the author to hold his or her own book in electronic form. It's a file, no more or less than the words you wrote. It's ephemeral, but then, aren't the words what really counts?
The e-book version looks great, like all of Top Five Books' work. The font is elegant, with a slightly old-fashioned feel, and the page looks wonderful, especially in portrait. Of course, I think the print copies will feel even better, and there is something about the materiality of the printed page that still holds us, through memory or association.
Yet, I'm reminded of the light, almost onion-skin paper of the compact editions of Dickens I first read at home, and how the electronic page in iBooks (or Kindle) almost duplicates that lightness, and comes closer to the book that Borges speculated about: infinite pages of infinite thinness.