Writer Paul Gregory Smith will lead a discussion about how and why horror literature thrills, provokes and entertains at Camden Public Library on Thursday, October 31, at 7 p.m. Using short readings from the works of Edgar Allan Poe, Stephen King, Anne Rice and his own work, Smith will explore the dynamics of mood, suspense and mystery. Apple cider and doughnuts will be served. Smith is a former U.S. Army brigadier general and public school educator. In addition to his horror novel, “Prayers for Evil,” his writing has appeared in publications including Country Living, Military History, and the Boston Globe. The program is free; signed copies of “Prayers for Evil” will be available for purchase. For more information, visit librarycamden.org.