An instinct for trouble - Carolyn Keene

Nancy has come to Yellowstone National Park at the urgent request of Ned, her boyfriend. He's there studying the marmot population but calls for Nancy when it's discovered that someone's been stealing the prized animals to sell on the black market. But the marmots aren't the only ones at risk. Several members of the project, including Ned, have been attacked and one is recovering in hospital. Nancy's going to have to be very careful if she doesn't want to be the next person to fall right into the poacher's deadly trap!