Jackie Morse Kessler's Riders of the Apocalypse series follows teens who are transformed into the Four Horsemen of the Apocalypse. The third book in the Riders of the Apocalypse series, Loss, is about a bullied teenager who's tricked into becoming Pestilence, a Rider of the Apocalypse, and finds himself with the power to infect people with diseases. Fifteen-year-old Billy Ballard is the kid that everyone picks on. But things change drastically when...