"It's not easy thinking about all the ways the world can end, let alone writing a whole book about them. But Bryan Walsh has managed the feat and then some, delivering a book that's as analytically astute as it is terrifically written. It takes a special kind of writer to pull this off, and in Bryan Walsh we found him."(Ian Bremmer, New York Times best-selling author of Us Versus Them: The Failure of Globalism)

"In End Times, Bryan Walsh has put together the loudest, scariest wake-up call possible. And yet it's not a book without hope: Walsh lays out a challenging series of believable scenarios that can allow human beings to thrive along with our fellow earth-dwellers, in a way that requires only qualities we already have: compassion, intelligence, focus, and determination." (Mark Bittman, New York Times columnist and best-selling author)

"It takes a bold reporter and subtle thinker to survey the mortal threats we face and find a way towards hope; yet that is what Bryan Walsh has done in this terrifying, fascinating exploration of existential risk. Cascading catastrophes of the manmade kind are so frightful to consider that we naturally look the other way; but Walsh invites us to reckon with the world we've made, a crucial step towards taking responsibility for saving us from ourselves. The asteroids, the supervolcanoes, the plagues are not of our making; but the nukes, the climate disruption, the weaponized pathogens and challenges of AI are. With a storyteller's art and a scientists tools, Walsh helps us think the unthinkable, takes us to the observatories and laboratories where the future is made. Travel with him to doomsday and back, and nothing looks the same." (Nancy Gibbs, coauthor of New York Times best seller The Presidents Club: Inside the World's Most Exclusive Fraternity)