Since 1984, Eric Dinerstein has led the team directly responsible for the recovery of the greater one-horned rhinoceros in the Royal Chitwan National Park in Nepal, where the population had once declined to as few as 100 rhinos. The Return of the Unicorns is an account of what it takes to save endangered large mammals. Dinerstein outlines the multifaceted recovery program -- structured around targeted fieldwork and scientific research, effective protective measures, habitat planning and management, public-awareness campaigns, economic incentives to promote local guardianship, and bold, uncompromising leadership -- that brought these extraordinary animals back from the brink of extinction. In an age when scientists must also become politicians, educators, fund-raisers, and activists in order to safeguard the subjects they study, Dinerstein's inspiring story offers a successful model for large-mammal conservation applicable throughout Asia and across the globe.