"New Zealand Fiction." . . "Children's stories, New Zealand" . . . . "Auckland (N.Z.)" . . "Brothers and sisters Fiction" . . "Fantasy." . . "Twins--Children's fiction" . . "Originally published: Wellington: Oxford University Press, 1979." . . "Twins Fiction." . . . . . . . . . . . "While vacationing with relatives in Auckland, twins Theo and Rachel discover that they are endowed with special powers to oppose mysterious giant creatures that are determined to destroy the world." . "While vacationing with relatives in Auckland, twins Theo and Rachel discover that they are endowed with special powers to oppose mysterious giant creatures that are determined to destroy the world."@en . . "Under the mountain" . "Under the mountain"@en . . "Fantasy fiction" . . . . . . "Children's stories, New Zealand" . . . . . . . . . . . . "Children's stories"@en . . "Juvenile works"@en . "Juvenile works" . . . . . . . . . . "Fiction" . . . "Fiction"@en . . . . "While vacationing with relatives in Auckland, twins Theo and Rachel discover that they are endowed with special powers to oppose mysterious giant creatures that are determined to destroy the world. Suggested level: intermediate, junior secondary." . . . . . . "New Zealand" . .