Close to Death (by Anthony Horowitz)

The fifth book in Horowitz's metafictional Hawthorne mystery series; in this one, he writes about a Hawthorne cold case, Agatha Christie style, and also about the experience of trying to write about the cold case when Hawthorne won't tell him the ending. (Although it's just a google search away...)

I love a Christie-style mystery (Horowitz always fools me), and a postmodernist twist. I love that Horowitz has no problem making his fictional self so annoying. And the central mystery is very satisfying, in that it makes perfect sense but also I never saw it coming.