Thunderbird

Janine Prentiss is tired of spending her summers digging up dinosaur bones with her single-parent father, an eminent paleontologist. But neither does she want to spend her summer vacation listening to her shaman grandfather's lame tales of spirit quests and totem creatures who talk.

Justin Prentiss thinks his twin sister is nuts. What kid in their right mind wouldn't love field camp? The wild beauty of Montana mountains, fresh air, and adults too busy to pay attention to what a guy is doing ...