My current-thing-of-the-moment is ‘Doomsday Machines‘ by Alex Wellerstein of NukeMap/Nuclear Secrecy Blog fame. Fairly new, it looks at the post-apocalyptic world in both fact and fiction and, if you’re looking for a starting point, then I’d suggest ‘The end of The Road‘ – a look at Cormac McCarthy’s The Road and McCarthy’s own take on the themes of the novel.