In 1969, the world was shocked by a series of murders committed by Charles Manson and his "family" of followers. Although the defendants were sentenced to death in 1971, their sentences were commuted to life with parole in 1972; since 1978, they have been regularly attending parole hearings. Today all of the living defendants remain behind bars.

Relying on nearly fifty years of parole hearing transcripts, as well as interviews and archival materials, Hadar Aviram invites readers into the opaque world of the California parole process—a realm of almost unfettered administrative discretion, prison programming inadequacies, high-pitched emotions, and political pressures. Yesterday's Monsters offers a fresh longitudinal perspective on extreme punishment.