SAYEN LEE WAS SLEEPING restlessly when stomach pangs brought her to full consciousness. She needed a physician. Though it was the quiet shift, she didn’t think Dr. Sparks would mind seeing her. He was always so obliging. In a short time, she was at his desk. “Navigator Lee, how pleasant to see you again. Please take a seat.” Sparks smiled widely and gestured to the chair opposite him. Just seeing the man made Sayen feel better. She loved the way he’d set up his consulting room like the physicians’ offices of the twenty-first century. There were none of the bulky scanners and equipment that now filled health clinics to the brim: machines to analyze the breath, upright full-body scanners, equipment to extract and test blood. He had these devices and more, but he hid them away in the back,