But, at forty-eight years old, having spent decades in San Francisco, he craved change. Grieving over the death of his partner, he quickly discovered the profound consolations of the city's incessant rhythms, the sight of the Empire State Building against the night sky, and New Yorkers themselves, kindred souls that Hayes, a lifelong insomniac, encountered on late-night strolls with his camera.And he unexpectedly fell in love again, with his friend and neighbor, the writer and neurologist Oliver Sacks, whose exuberance--"I don't so much fear death as I do wasting life," he tells Hayes early on--is captured in vignettes throughout. What emerges is a portrait of Sacks at his most personal and endearing, from falling in love for the first time at age seventy-five to facing illness and death (Sacks died of cancer in August 2015).

    And yet she is often confounded by the cases she describes in her column: unexpected collections of symptoms that she and other physicians struggle to diagnose.A twenty-eight-year-old man, vacationing in the Bahamas for his birthday, tries some barracuda for dinner. Hours later, he collapses on the dance floor with crippling stomach pains. A middle-aged woman returns to her doctor, after visiting two days earlier with a mild rash on the back of her hands. Now the rash has turned purple and has spread across her entire body in whiplike streaks. A young elephant trainer in a traveling circus, once head-butted by a rogue zebra, is suddenly beset with splitting headaches, as if someone were "slamming a door inside his head."In each of these cases, the path to diagnosis--and treatment--is winding, sometimes frustratingly unclear. Dr. Sanders shows how making the right diagnosis requires expertise, painstaking procedure, and sometimes a little luck. Intricate, gripping, and full of twists and turns, Diagnosis puts readers in the doctor's place. It lets them see what doctors see, feel the uncertainty they feel--and experience the thrill when the puzzle is finally solved.