In Promise Land, Jessica Lamb-Shapiro recounts her efforts to conquer one of her multiple phobias by attending a support group called Freedom to Fly. The group’s course, led by a psychologist, met at the Westchester airport and culminated in a round-trip flight to Boston. Lamb-Shapiro secretly had no intention of boarding the flight, but she ultimately mustered the nerve, thanks in part to peer pressure and the charismatic leader. The decisive influence, however, was chemical rather than social. “I had often wondered if taking a pill would prevent me from thinking I was about to die on a plane