About 3.2 million Americans have the brain disorder schizophrenia, but about 40 percent of schizophrenics go undiagnosed. That was the case for many of Mimi and Don Galvin’s sons: six of 12 siblings whose story is the subject of Robert Kolker’s compelling narrative, “Hidden Valley Road: Inside the Mind of an American Family.”

Kolker embeds their shocking and poignant family story into the ongoing scientific quest to understand how schizophrenia works and how to treat its victims. “Hidden Valley Road” is author Robert Kolker’s second book, and it’s our May selection for “Bookmarked: The Under the Radar Book Club.”

Guest:

Robert Kolker — author of “Hidden Valley Road: Inside the Mind of An American Family,” which is available in bookstores and online now.