The Deluge -- a darker take on climate change than Ministry for the Future, but also felt pretty realistic.

This is how you lose the time war -- took me a long time to start this book, and then I couldn't put it down.

Non fiction, I really enjoyed Slouching Towards Utopia. I'm a sucker for narrative history like that, and I got a few useful concepts from the book. I also really liked The Prince of Peace, a biography of Keynes.