Michigan and the Great Lakes

The Wolves of Isle Royale

A Broken Balance
Rolf O. Peterson
A new edition of a classic: the compelling firsthand account of an ancient predator-prey relationship---the Isle Royale wolf and moose dynamic


For nearly half a century Isle Royale National Park has been the site of a comprehensive study on wolves (2008 marks the fiftieth anniversary)—the world's longest-running study on any wild animal. With its lush northern landscape and wolf and moose populations, the pristine and isolated park presents an ideal laboratory for wildlife biologists.

The Wolves of Isle Royale is author and wildlife biologist Rolf Peterson's fascinating firsthand account of the relationship that exists between the wolf and the moose on the island. Illustrated with over 100 photographs, this book reveals the true nature of the mysterious and little-understood wolf, and it offers novel solutions to the conservation crisis as the wolf population falters to its lowest recorded level.

Cover photo credit: Rolf O. Peterson

Rolf O. Peterson is known worldwide for his wolf research. His photographs have been published in National Geographic, Audubon, and National Wildlife. He is Professor of Wildlife Ecology at Michigan Technological University.

Praise / Awards

  • "Few can rival what Rolf Peterson has accomplished on Isle Royale. His study, a true classic, offers lessons and examples to us all who hope to do the same. This book reveals some of the secrets and details of this one-of-a-kind wolf study."
    —Douglas W. Smith, Leader of Yellowstone Wolf Project

Product Details

  • 6.625 x 9.5.
  • 192pp.
  • 109 color, 2 maps, 1 chart.
Available for sale worldwide

  • Paper
  • 2007
  • Available
  • 978-0-472-03261-7

Add to Cart
  • $29.95 U.S.