Power twins and the worm puzzle

By Ken Follett

Subjects: Science fiction, Mystery and detective stories, Twins, Uncles, Children's stories, Extraterrestrial beings, Life on other planets, Fiction, Children's fiction, Juvenile fiction, Twins, fiction

Description: Uncle Grigorian, who turns out to be an alien, takes the Price twins and their cousin Tubs to the capital of the Galactic Empire, where they serve as unbiased arbitrators in the Worm War.