This book, first published in 1979, presents a portrait of science fiction as a distinct form of serious and creative literature. Contributors are drawn from Britain, America and Europe, and range from well-known academic critics to young novelists. The essays establish the common properties of science fiction writing, and assess the history and significance of a field in which critical judgements have often been unreliable. The material ranges from the earliest imaginative journeys to the moon, to later developments of British, American and European science fiction.