When it comes to how societies remember their increasingly distant dreams and catastrophes, we often think of archives, documentaries, or memorials carved from stone. But in Time's Echo, the award-winning critic and cultural historian Jeremy Eichler makes a revelatory case for the power of music as culture's memory, an art form uniquely capable of bearing witness to history. With a critic's ear, a scholar's erudition, and a novelist's eye for detail, Eichler shows how four towering composers-Richard Strauss, Arnold Schoenberg, Dmitri Shostakovich, and Benjamin Britten-lived through the era of the Second World War and the Holocaust and later transformed their experiences into deeply moving, transcendent works of music, scores that echo lost time. Summoning the supporting testimony of writers, poets, philosophers, musicians, and everyday citizens, Eichler reveals how the essence of an entire epoch has been inscribed in these sounds and stories. As the living memory of the Second World War fades, Time's Echo proposes new ways of listening to history, and learning to hear between its notes the resonances of what another era has written, heard, dreamed, hoped, and mourned. A lyrical narrative full of insight and compassion, this book deepens how we think about the legacies of war, the presence of the past, and the hope-filled promise of art for our lives today.