“The true nature of reflexology isn’t that the body exists pre-mapped onto the foot,” explains Behrooz. “It’s that the therapist is capable of mapping the zones onto any arbitrary surface. Feet work because they’re an easy and uncluttered interface, but the same technique informs aura readings, chakra theory and what you would probably call ‘voodoo dolls.’ Understand the flow of qi in the body and anything becomes an input device. The wall of this room, for instance.”

He flips a light switch. Avi screams.

“Now,” Behrooz says, “are you going to cooperate, or do I have to explain the sauna?”