Eight-year-old Jack and his seven-year-old sister, Annie, learn about the ocean, solve the mystery of its fabled sea monster, and gain compassion for their fellow creatures after joining a group of nineteenth-century explorers aboard the H.M.S. "Challenger.".
year: 2019
call number/section: 1000
subjects: jack, (fictional character from osborne), fiction, annie, challenger (ship : 1858-1878), fiction, oceanography, fiction, compassion, magic, tree houses, siblings, chinese language, time-travel fiction