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Zealotry is a book category that spotlights the psychology, allure, and fallout of uncompromising belief—religious, political, ideological, or personal. Encompassing fiction and nonfiction alike, it follows how fervor takes root and hardens into identity, examining charismatic leadership, groupthink, propaganda, purity tests, and the thin line between devotion and fanaticism. Stories may track cults, radical movements, single-issue crusades, or insular communities and echo chambers, seen through believers, defectors, investigators, and those affected on the periphery. The genre probes moral trade-offs and human costs—fractured families, violence, sacrifice—while tracing arcs of doubt, deprogramming, or reform. Whether rendered as literary novels, thrillers, memoirs, reportage, or history, Zealotry invites readers to interrogate the power and peril of absolute conviction without endorsing extremism.

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