The prequel to the terrifying novella, Killers, the original version of Serial, still available as a free ebook, was a 7500 word horror short story done as an experiment.­Remember the twin golden rules of hitchhiking?­#1: Don't go hitchhiking, because the driver who picks you up could be certifiably crazy.­#2: Don't pick up hitchhikers, because the traveler you pick up could be certifiably crazy.­So what if, on some dark, isolated road, Crazy #1 offered a ride to Crazy #2?­When Blake Crouch (Desert Place, Locked Doors) and Jack Kilborn (Trapped, Endurance), face-­off, the result is Serial, a terrifying tale of hitchhiking gone terribly wrong. Like a deeply twisted version of an “After School Special,­" Serial is the single most persuasive public service announcement on the hazards of free car rides.­Beyond a thrilling piece of horrifying suspense, Serial is also a groundbreaking experiment in literary collaboration. Kilborn wrote the first part.