"Hidden Valley Road contains everything: scientific intrigue, meticulous reporting, startling revelations, and, most of all, a profound sense of humanity. It is that rare book that can be read again and again." -David Grann, author of Killers of the Flower Moon One of the New York Times' "20 most anticipated books of 2020": the heartrending story of a mid-century American family with twelve children, six of them diagnosed with schizophrenia, that became science's great hope in the quest to understand the disease. "An extraordinary case study and tour de force of reporting." -Sylvia Nasar, author of A Beautiful Mind Don and Mimi Galvin seemed to be living the American dream. After World War II, Don's work with the Air Force brought them to Colorado, where their twelve children perfectly spanned the baby boom: the oldest born in 1945, the youngest in 1965. In those years, there was an established script for a family like the Galvins - aspiration, hard work, upward mobility, domestic harmony - and they worked hard to play their parts. But behind the scenes was a different story: psychological breakdown, sudden shocking violence, hidden abuse. By the mid-1970s, six of the ten Galvin boys, one after the other, were diagnosed as schizophrenic. How could all this happen to one family? What