"Circus" by Alan Edward Nourse is a science fiction novel written in the early 1960s. The story revolves around the theme of alien interaction and the complexities of communication across different worlds. It explores the existential challenges faced by a character navigating a parallel universe. The narrative follows Jefferson Haldeman Parks, an alien stranded on Earth after a malfunction during a warp travel attempt. He desperately seeks help from Morgan, a writer, to return to his home. Despite his pleas and detailed accounts of his origins, Parks encounters skepticism and disbelief from the people he approaches, including representatives of authority. He grapples with feelings of isolation and frustration as he tries to prove his identity and the technological principles behind warp travel. Ultimately, the story poses profound questions about perception, belief, and the nature of humanity, culminating in a poignant exploration of the barriers to understanding between vastly different worlds. (This is an automatically generated summary.)