"Invasion of the Body Snatchers" is a science fiction novel written by Jack Finney, first published in 1955. The story revolves around a small town where residents begin to notice that their friends and family are acting strangely. It is revealed that alien beings are replacing humans with identical copies, devoid of emotions and individuality. The narrative explores themes of identity, conformity, and paranoia. As the protagonist, Dr. Miles Bennell, investigates the phenomenon, he struggles to convince others of the invasion, leading to a sense of isolation and fear. The novel has been adapted into several films, further cementing its status in popular culture.