"...it is timely that David Waltner-Toews has written a concise book that effectively sets out "a practical approach" to guide veterinarians and others who head into this new territory. It is rich in conceptual content. The author is superbly prepared for this undertaking...Veterinarians with special interests in wildlife disease, toxicology, epidemiology, population medicine, and public policy will find this book useful in placing their expertise in the wider context of ecosystem health. More generally, educators and leaders of the profesion should find the book helpful in making the profession more responsive to societal needs." - N. Ole Nielsen DVM, PhD, University of Guelph