I've read in so many places about what a great author Graham Greene was and that one should read all his books. The first time I read this, I'd never even heard of Graham Greene, which always embarrasses me and makes me add all said books to my "to be read" list, so as not to look like I'm not well-read!!
Anyway, the book I chose to read as an introduction to Graham Greene was The End of the Affair, which was made into a movie. (I'd be interested in hearing comments from anyone who saw it!) I liked this book. I don't know if I can explain what I mean, but it's an "intelligent" book. The writing is flawless, the subject matter fascinating, and yet it doesn't sweep you along so that you forget to eat dinner. It's more subtle than the style of most modern fiction where we expect to be swept away and riveted by the plot.
Having said that, I never faltered in reading it, wasn't bored. In fact, I read it in just a few days and was surprised at the emotion that it brought up since it wasn't written in an effusive style. It's a book worth reading. You'll feel more intelligent and well-read if you do.