"Identity" by George O. Smith is a science fiction novel written in the mid-20th century. Set in a futuristic world filled with advanced technologies, the story explores themes of identity, twin relationships, and the quest for treasure. The main topic revolves around the protagonist, Cal Blair, who grapples with his problematic relationship with his identical twin brother while embarking on a treasure hunt linked to the notorious pirate Hellion Murdoch. In the narrative, Cal Blair, a cryptologist, discovers a mysterious Key that is believed to lead to Murdoch's Hoard, a legendary treasure rumored to hold invaluable medical knowledge. The plot thickens when Cal's twin, Benj, attempts to impersonate him and get his hands on the Key for nefarious purposes. As Cal sets off on a perilous journey to uncover the Hoard, he faces both physical and emotional challenges, including a confrontation with Benj. Along the way, he also navigates his feelings for Tinker Elliott, a skilled surgeon and his love interest. Their journey culminates in a race against time to retrieve the medical advances hidden away by Murdoch, ultimately questioning the very nature of identity and the ethical implications of duplicating human life. (This is an automatically generated summary.)