This book generated more controversy that it deserves in my opinion.
I've heard countless statements about the book, from both non-religious, and religious figures. One side was all gung-ho about the fact that Hawking denounces God claims we do not need any supernatural forces to explain our Universe. The other side was offended for the same reasons.
While I think the book is as great as anything Stephen Hawking wrote in the past, I did not find it revealing, especially in light of his other famous book "A Brief History of Time".
His science is as good as ever, his delivery right on the mark, giving just enough details to keep us, mortals, interested without putting us to sleep. The "revelations" are nothing new in science, which has been staying away from supernatural explanations for many decades (if not centuries).
The only surprise I got: Hawking does not believe that we are going to find a "theory of everything". Many, smaller, more compact theories might have to do, each corresponding to a particular universe.
The rest of the "controversy" was in my opinion just marketing.
I still recommend this book as a great reading!!!