The bestselling horror author Stephen Graham Jones is said to have reinvented the slasher genre. His latest novel, “I Was a Teenage Slasher,” puts the reader directly into the mind of a killer. Stephen joins guest host Talia Schlanger to talk about the book, his love of slashers, and why he thinks it’s the job of horror writers to walk into the darkness as far as they can — and then take two steps more.