"Cosmic Yo-Yo" by Ross Rocklynne is a science fiction novella published in the mid-20th century, specifically during the post-World War II era. The story explores themes of adventure and resourcefulness in space, centering around the quest to transport a uniquely shaped asteroid to fulfill a wealthy client's unconventional request—a wedding venue in the asteroid belt. The plot intertwines elements of romance and rivalry as the characters navigate the challenges posed by both a competing company and unexpected inhabitants on their find. The narrative follows Bob Parker and his partner Queazy, who stumble upon a wedge-shaped asteroid fitting the exact specifications needed by Mr. Andrew S. Burnside for his granddaughter's wedding. However, their plans are complicated by the arrival of Starre Lowenthal, who reveals her claim over the asteroid, leading to confrontations with the unscrupulous Saylor brothers, who also want the asteroid for themselves. As tensions rise, Bob and his companions devise a clever plan that incorporates Bob's expertise to manipulate the asteroid's composition, ultimately thwarting the Saylors and delivering a remarkable twist just in time for the wedding. The story concludes with a playful exploration of love and resourcefulness, highlighting the characters' quick thinking and unexpected collaboration. (This is an automatically generated summary.)