From Pliny the Younger to the Amityville Horror, we’ve been convinced there’s something undead living inside our homes rent-free for thousands of years. This Halloween, join New York Times bestselling author Grady Hendrix for another of his one-of-a-kind one-man shows, tap-dancing through the haunted hallways of houses from Downton Abbey-sized country homes to split-level suburban ranchers as we try to figure out why we’re so obsessed with the world’s worst roommates — ghosts.