Grateful Dead Book Host Scott Simon talks with Dennis McNally, the author of a new book about the Grateful Dead. McNally is the official historian of the Grateful Dead, and a longtime fan. His book, "A Long Strange Trip," is a look into the phenomenon, and the history, of the original jam band. (12:00)

Grateful Dead Book

Host Scott Simon talks with Dennis McNally, the author of a new book about the Grateful Dead. McNally is the official historian of the Grateful Dead, and a longtime fan. His book, "A Long Strange Trip," is a look into the phenomenon, and the history, of the original jam band. (12:00)