11/22/63 is a very enjoyable and entertaining read, but personally I didn't find it to have much depth. Maybe it's because I wasn't alive during the Kennedy assassination, and due to that, I might not have as strong of a connection with this book as some others.
Essentially, though, here's the message that I got from the book: The past is obdurate, but well, so is love in its own way. While it's a fascinating message that accompanies a fascinating story, I personally didn't find it to be a particularly awe-inducing message. I guess what I'm saying is that, although I really enjoyed reading 11/22/63, it's not the kind of book that I'm going to think about a lot (or at all) now that I'm finished with it.
For those who are considering reading this book, don't be daunted by the length. Yes, it's almost 900 pages (according to my Kindle), and some of those pages could have probably been cut without detriment to the story, but the book is so unique and intriguing that the pages fly by.
My only critique with regard to the writing is how Jake speaks when he's in the past. Perhaps the way he speaks and the phrases he uses sound right for the late '50s, early '60s setting ... but unless he happened to watch a whole lot of '50s/60's films in his time, how would he know that? He certainly didn't sound like someone from 2011, and if I went back to the past, I'm sure that I wouldn't be speaking like that. This may seem like (and is only) a minor critique, but since it bothered me, it brought me out of the story a lot when Jake spoke to others.
Major spoilers coming:
Yet, all in all, this is a good read that I immensely enjoyed in the moment, which is a lot more than I can say about most books.