I'm with maestro (well said, sir!). McEwan's books are rich treats for me. Enjoy the lingering read, allow yourself to become immersed in the worlds he creates so fully with his words.
The ending of 'Atonement' is an ending that has stuck with me for ages. At first, it disappointed me in a BIG way. But, then, it made me think and think some more. Ultimately, I decided it was the only possible way the story could have ended.
The movie's not bad, either.