Twelve-year-old Jack, his sister, and the family's foster child Troy go to Yellowstone National Park, where Jack's mother, a wildlife veterinarian, is investigating the report that wolves reintroduced to the park have killed a dog there.
- Paperback | 149 pages
- 132.6 x 214.4 x 13.5mm | 218.97g
- 01 May 2001
- National Geographic Society
- United States