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"Amateur detectives" is a book category featuring protagonists who solve crimes or mysteries without being professional investigators — ordinary people, hobbyists, or specialists in unrelated fields (housewives, librarians, journalists, retired professionals, etc.) who are drawn into sleuthing by curiosity, personal stakes, or a sense of justice. These stories center on the character's resourcefulness, local knowledge, and unconventional methods rather than police procedure, and they often emphasize clue-gathering, red herrings, and puzzle-solving. Settings tend to be intimate or everyday (small towns, households, workplaces), which highlights social detail and character-driven motivation; the lack of formal training raises tension and vulnerability but also allows for creative revelations. The tone can range from cozy and lighthearted to dark and suspenseful, and the appeal lies in watching an ordinary person outthink crimes and expose hidden truths, often revealing broader social or moral themes along the way.

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