Approaching his forty-first birthday, Dr. Geoffrey Kurland was a busy man. His work as a Pediatric Pulmonologist, caring for children with lung diseases such as cystic fibrosis and asthma, led to long hours on the wards at the University of California, Davis Medical Center. At the same time, he was in the midst of training for the Western States Endurance Run, a grueling 100-mile long footrace across the wilderness of the Sierra Nevada Mountains. His long training runs, the responsibilities of patient care and teaching, and relationships attempting to replace his departed girlfriend occupied...