A Voyage to Arcturus is a novel by Scottish writer David Lindsay, first published in 1920. It combines fantasy, philosophy, and science fiction in an exploration of the nature of good and evil and their relationship with existence. Critic and philosopher Colin Wilson described it as the "greatest novel of the twentieth century", and it was a central influence on C. S. Lewis' Space Trilogy. J. R. R. Tolkien said he read the book "with avidity". Clive Barker has stated "A Voyage to Arcturus is a masterpiece" and called it "an extraordinary work . . . quite magnificent."