On a sunny morning in early 2000, Joseph Matheny woke up to find conspiracy theorists camped out on his lawn again. He was making coffee when he noticed a face peering in a ground-floor window of the small, three-story building he rented in Santa Cruz. Past the peeper, there were three other men in their early 20s loitering awkwardly. Matheny sighed and stepped outside. He already knew what they wanted. They wanted to know the truth about Ong’s Hat. They wanted the secret to interdimensional travel.