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This is a great book that won the Newbery Award.

Professor William Waterman Sherman was rescued by a steam ship. He had left to travel around the world in a giant balloon but he had twenty large balloons when he was rescued. He tells a tale of a secret world on a volcanic island with a rich diamond mine. This island has the volcano Krakatoa which was one of the biggest volcanic eruptions in history.

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11y ago

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