Mech's landmark study of wolves and moose on Isle Royale National Park on Lake Superior. The author lived among them during the three-years of his research. Isle Royale is an isolated wilderness ecosystem which is perfect for scientific study.
Dr. L. David Mech is the best-known and most highly regarded wolf researcher in the world. He works with the Biological Services Division, U.S. Geological Survey, and is also the author of several other books on wolves. He has studied wolves and their prey full-time since 1958, except for a four-year period when he studied radio-tracking. During this record-long career as a wolf biologist, he has published numerous books and articles; this book was originally published by the National Park Service in 1966.

"Mech is the foremost expert on wolves in this country, possibly in the world, hands down." - Smithsonian magazine