This is a book i finished reading about a month ago. It really got through to me and for a few weeks afterwards, i couldn't get its' concepts out of mind. Everything rang so true. There were plenty of moments during reading the book where a light-bulb would flash and i would go "A-ha!".
It is a book that is hard to describe to people. And it is the kind of book that can only be read when ready. I imagine if one was to read it too soon, then it wouldn't get through to the reader (I.e. If i read this when i was in high school i probably would have laughed at it). But i suppose the best way to describe the book is as an "awakening" book. It advocates present moment awareness and the dismantling of the ego as the path towards awakened living. Some of the things in the book i don't agree with, but for the most part it hits the nail on the head. But it's really something that one must judge for him/herself.
Yes, it was promoted on Oprah, but don't let that deter you.
People that are already familiar with eastern spiritual philosophies such as buddhism may not get much out of this book, as it is mostly a rehash of those concepts. But it is just communicated in a more "western" way.
Check it out on Amazon.
Check it out on Wiki.