Guest from the Depths

William Deep—a young, fearless conqueror of the ocean depths—is how young Billy imagines himself as he relaxes with his sister, Sheena, aboard the schooner Cassandra, which belongs to his scientist uncle. But this year, reality will surpass all fantasies, for the coral reef near which the Cassandra has dropped anchor hides many mysteries. There are even rumors of a mermaid living in these waters, and Billy becomes determined to catch her. But an extraordinary encounter with a guest from the deep will bring him no happiness...