On the distant planet Dreenor lives the most powerful species in the Galaxy. All of the Universe is the creation of the Dreens, who posses the power of 'idmaging', turning their thoughts into reality. The can create whole worlds, of which the wild, ungovernable planet Earth is one. But suddenly Earth is a threat, its people on the verge of discovering interstellar travel, and with it, of gaining access to Dreenor itself - a paradox within a paradox, not to be permitted.
While the elder Dreens plan Earth's destruction, a youngster, Ryll, embarks on an unauthorised jaunt across space. Forced for survival to merge bodies with an Earther whose mind is as strong as his own, he has to battle for control.
And the future of all earthly life lies in the hand of a composite being, half wily, aggressive human, half na ve adolescent alien, confused and far from home.
Frank Herbert (1920-86) was born in Tacoma, Washington and worked as a reporter and later editor of a number of West Coast newspapers before becoming a full-time writer. His first SF story was published in 1952 but he achieved fame more than ten years later with the publication in Analog of 'Dune World' and 'The Prophet of Dune' that were amalgamated in the novel Dune in 1965.