(Today’s guy: Charles Stross)
If you’re the sort of person who thinks that mixing higher mathematics, spy fiction, and the Cthulhu Mythos is kind of cool… well, you’ve probably already read The Atrocity Archives and The Jennifer Morgue. On the other hand, if the idea’s never actually occurred to you before, or you’re just looking for a good couple of books, you should pick these two up. Stross is a fun writer with a good eye for combining horror and science fiction; his alternate histories (the most developed being the Merchant Princes series; a couple of good ones can be found in his short story collection Toast) are likewise well-conceived. The space opera that he’s done has not really reeled me in as much, but there’s nothing wrong with it; I’m just more of a E. E. “Doc” Smith type.