"Hold Back Tomorrow" by Kris Neville is a science fiction novel written during the early 1950s. Set in a future society where people can live for centuries, the story explores themes of youth, aging, and the desire to remain young. The narrative revolves around the protagonist, Margy, who grapples with the frightening concept of growing old and dying, contrasting her youthful innocence with the adult responsibilities and complexities that come with maturity. The plot centers on Margy's relationship with Clyde, a boy with whom she shares a tender, yet complicated bond as they both face the pressures of impending adulthood. As Clyde expresses his desire to marry Margy to help them both grow up, Margy is torn between her feelings for him and her fear of losing her youth and innocence. Throughout the story, Margy struggles with societal expectations and her own internal conflicts about aging, leading to moments of desperation and vulnerability. Ultimately, Margy’s plea to remain young highlights the broader existential dilemmas of identity, love, and the inevitable passage of time, culminating in a poignant conclusion that underscores her yearning for perpetual youth amidst the harsh realities of life. (This is an automatically generated summary.)