In 1848, ten-year-old Toozak, a Yupik Eskimo, sees a whale being born and is told by a shaman that he and his descendants must protect that whale, which Toozak names Siku, as long as it lives. Interest Level: 3-6 Reading Level: 5.3 ATOS Book Level: 5.3 AR Interest Level: MG AR Points: 5 AR Quiz: 166596EN Lexile Measure: 750.