Dolphins at Daybreak
by Mary Pope Osborne
Part of the Magic Tree House series, this adventure follows siblings Jack and Annie as they use their magical tree house to travel back in time to the ocean near a coral reef. The children encounter dolphins and learn about marine life while on a mission to solve a riddle and help save their friend Morgan le Fay. The story combines fantasy adventure with educational content about ocean ecosystems and marine conservation, emphasizing themes of sibling cooperation, problem-solving, and environmental awareness.
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