The edition I had (first one I think) was weirdly peppered with some typos. All in all a great read, I've particularly enjoyed it because it is largely set in places I'm from (an inexistent but highly similar to real towns in the South of Italy, near Naples).
A psychological thriller immersed in beautiful, coloured and full of life landscapes, under the sun of course. It also gives you an interesting overview of Italy during the '50s, when after the war Americans coming to the country for leisure or business were largely regarded as very appreciated guests.
Unlike most cases, I thought the movie is as good as the book.