Title: Winter study
Description: Visiting an isolated Lake Superior isle to study wolf behavior, ranger Anna Pigeon joins a scientific group that subsequently discovers unusual DNA evidence suggesting that a giant and dangerous wolf hybrid has been introduced by an unknown source.
Subjects: Women park rangers, Anna Pigeon (Fictitious character), Wolves, Fiction, Fiction, mystery & detective, general, Missing persons, fiction, Pigeon, anna (fictitious character), fiction, Michigan, fiction, Park rangers, fiction, nyt:mass-market-paperback=2009-04-26, New York Times bestseller
Places: Rocky Mountain National Park (Colo.), Colorado, Michigan, Rocky Mountain National Park, Isle Royale, Isle Royale (Mich.)