After each cliffhanger death and betrayal in Game of Thrones, viewers must wait seven days until the next episode delivers resolution. As agonizing as that is, it’s an eye-blink compared to the glacial pace of serial book publishing—something many an erstwhile George R.R. Martin fan knows. Genre fiction, like TV, increasingly depends upon serialized long-arc storytelling; it’s rare these days to see a science-fiction or fantasy novel that isn’t part of a trilogy (or longer). Yet, the book world historically has been unable to match the comparatively rollicking pace of television.