St.Cloud Anyone?

So I have just finished reading Charlie St.Cloud, which ended up being a GREAT book. I know that the movie has been out for a while, and you have more than likely seen it so your thinking "Oh the movie is just like the book, so why read it", but from what I have heard about the movie is that it is nothing like the book.
Charlie St.Cloud is about a guy who had a bad wreck when he was a kid, that killed his brother, Sam, and their beagle, Oscar, he almost dies his self but someone saves him. Charlie is able to see the dead and his brother. He finds his true love but is it too late to save her?????