RICK MCINTYRE has spent more than 40 years watching wolves in America's national parks, 25 of those years in Yellowstone, where he has accumulated over 100,000 wolf sightings and educated the public about the park's most famous wolves. He has spoken about the Yellowstone wolves with 60 Minutes, NPR, and CBC, and he is profiled extensively in Nate Blakeslee's American Wolf and in international publications. He lives in Silver Gate, Montana.

KIRA CASSIDY currently works as a Research Associate with the Yellowstone Wolf Project. Her scientific interests include territorial dynamics, the evolution of sociality, and the value of the individual in group-living species. She has contributed to at least twenty publications and various chapters in Yellowstone Wolves: Science and Discovery in the World's First National Park.