Just tossed my review of it up on Amazon. I actually got a kindle today and tried it out again, and if anything it looks better than it did on the nook color. Great job. Here's a copy of the review below if you're interested:
Let me preface this first by saying I got this for Kindle, and it looks fantastic. Ross Payton obviously put a lot of time and effort formatting the book for Kindle use and it shows. The text and pictures are coordinated well for easy reading, and is definitely one of the few RPG supplements I'd recommend for the Kindle. None of the info is messed up or broken and the images are scaled to look very nice on the e-ink screen.
As for the content, it's a breath of fresh air and it's great that it works for any RPG. Not being tied to a system allows the book to shine in fluff, giving players and game masters many options for their campaigns involving the undead. Too many supplements focus on just one type or one origin, but this one ties together many real world examples and legends with some great tropes done in a very well written and creative fashion. I'd recommend this book to anyone that wants to try something new with the Undead in their games, or just something new in general.