This book completes Robert G. Bailey's celebrated study of ecoregions, begun in the landmark Ecosystem Geography (1996) and further articulated in Ecoregions (1998). In this third installment, the author expands his system for defining large-scale ecological zones to encompass principles of land management, regional planning, and design. The book will be welcomed by land and resource managers, landscape architects and urban planners, ecologists, students, and anyone interested in ecology-based design.