Once driven to near extinction by the fur trade, beavers are making one of conservation's most inspiring comebacks. In Architects of the Adirondacks, the Dr. White tells the remarkable story of these master engineers, both the North American and Eurasian species, as they reclaim their ancient role as shapers of landscapes. From 10,000-year-old sedimentary DNA records and the deep-time resilience of Grand Teton wetlands to the rapid recovery in the Adirondacks and across Europe, this book reveals how beavers build "hydraulic empires" that restore biodiversity, recharge groundwater, buffer against floods and droughts, and create vital climate refuges. Blending cutting-edge science with vivid storytelling, it explores their sophisticated biology, family societies, dam-building genius, and complex relationships with humans, wolves, fish, and forests. Part natural history, part hopeful blueprint for coexistence, this timely book shows why embracing the beaver may be one of the smartest, most cost-effective ways to heal damaged watersheds and build resilience in an uncertain future.