Provides information about the lives of humpback whales, follows their annual migration from polar to tropical waters and back, and explains what they eat, how they stay warm, and how they travel. Animal Journeys and 3-6 - S.T.E.M. Science Print series. Interest Level: K-3 Reading Level: 5.0 ATOS Book Level: 5 AR Interest Level: LG AR Points: .5 AR Quiz: 142015EN DRA: 30 Guided Reading Level: N.