Let me start by saying that if you already own an e-reader, you most likely don't need this thing--but you'll likely want one.
Amazon's Kindle Oasis is a great, albeit very expensive, piece of kit. During testing, I loved its light weight, size and the way it felt in my hands as I used it. And the way the leather on its battery cover wears as you beat it up? Beautiful. Unfortunately, it's so expensive, when compared to e-readers that perform almost as well, that it's hard to recommend widely.
But hey, if you like books, why not take a peek at the review over at Macworld. Maybe it'll entice you to pick one up.