Osborne, Mary Pope. Magic tree house series. Merlin missions #11

Osborne, Mary Pope. Magic tree house series #39

Stepping Stone book.

"A Merlin mission."

Also published: New York : Random House, [2020?], c2008. 106 pages, 28 unnumbered pages

When eight-year-old Jack and his seven-year-old sister, Annie, join a group of nineteenth-century explorers aboard the H.M.S. Challenger, they learn about the ocean, solve the mystery of its fabled sea monster, and gain compassion for their fellow creatures

"Originally published in hardcover as Magic Tree House #39 in 2008"--Title page verso

520

520L

Decoding demand: 84 (very high) Semantic demand: 99 (very high) Syntactic demand: 76 (high) Structure demand: 83 (very high)