"At once reverie and urgent appeal, Horizon is beautiful and brutal - a story of the universal human condition, set in some of the most distinctive places on earth. Lopez [searches] both memory and meticulously recorded field notes, mining accumulated wisdom, seeking glimmers of hope. One of the strongest messages in Horizon is that without learning to embrace diversity, without listening to the tales told by cultures other than our own, we risk obliteration. Lopez’s reverence for exploring every corner of the world is infectious, [and] his knack for making friends in the most unlikely places resonates long after you turn the last page. ‘Are we not bound,’ he asks, ‘to learn how to speak with each other?'" (The New York Times Book Review)

"Sublime, dreamlike. One of America’s foremost naturalist writers, Lopez is a welcoming host as he brings you across the world.... Above all else, he wants us to consider. To find context and connections. To think about where to go from here. To take our time. Horizon is a contemplation of Lopez’s belief that the only way forward is compassionately, and together." (NPR)

"Beautifully composed [with] steady intellectual rigor - a capacious blend of popular science, travel writing and autobiography. There is no discernable limit to Lopez's curiosity: he writes with equal enthusiasm about human origins, the search for the edge of the expanding universe, classical music, arctic archaeology, Impressionist painting and Aboriginal rock art. He is at his best writing about natural history, where his scrupulous research and talent for lucid exposition make the business of scientific fieldwork come alive. The book is rendered with gorgeous prose, and spiked with humor.... Extraordinary." (The Wall Street Journal)