To say the least this book disappointed me. It had similar traits to Nights in Rodanthe of which I saw the movie only. The best part of the book were the beautiful letters.
Other than that, the man was never really over his wife to be in a relationship with a woman who sounded downright weird to me. Her character portrayed something which I found ugly; the way she discovers the letters and goes to find the man.
If it were just about understanding him and going off it would have made a better read than the whole romantic concept which shouldn't have begun in the first place.