"A Touch of E Flat" by Joe Gibson is a science fiction narrative written in the late 1950s. The book explores the unconventional invention of a non-lethal weapon, called a Cooling gun, developed by Albert Jamieson Cooling, a professor with a background in nuclear physics and biochemistry. The story reflects upon themes of morality and responsibility in the face of technological advancement during a time when societal fears about science and its military applications were at a peak. The plot centers around Cooling's accidental discovery that leads him to create a gun that puts its targets into a harmless sleep, a tool he believes can be used to prevent violence and save lives. However, as he grapples with the implications of his invention, especially regarding how it could be used for criminal purposes, he finds himself caught between the potential for creating a safer world and the risk of empowering criminals. The narrative oscillates between his moral dilemmas, attempts to safeguard the Cooling gun from misuse, and interactions with law enforcement, culminating in a tense climax that forces Cooling to confront the unintended consequences of his invention. Ultimately, the book invites readers to reflect on the ethical responsibilities that come with new technologies. (This is an automatically generated summary.)