Our guest is Dr. Elisha Waldman, a pediatric palliative care physician now based in Chicago, who tells us about his new book. It's a memoir called "This Narrow Space: A Pediatric Oncologist, His Jewish, Muslim, and Christian Patients, and a Hospital in Jerusalem," and it chronicles -- in ways lyrical, bittersweet, and inspiring -- the seven years he spent as a pediatric oncologist in Jerusalem. While there, as we learn, Dr.