True crime is not just a genre. It is one of the main ways modern societies learn what to fear-and whom to trust. Blaming the Boogeyman: The Business of Fear - True Crime and the Architecture of Control (1888-2025) follows the long arc from late-nineteenth-century murder coverage to today's algorithmically curated feeds, asking how stories of violence became central to the way media and the state manage social order. The book opens in the 1890s with H.H. Holmes, Jack the Ripper and the rise of mass-circulation newspapers, showing how telegraph wires and competitive city presses turned scattered crimes into national dramas. It moves through J. Edgar Hoover's FBI, which learned to script its own radio shows, newsreels and comics to sell "law and order" in the Depression and Red Scare. It tracks the consolidation of television cop shows and procedurals that normalised everyday police presence from the Cold War into the "war on drugs," and then into the cable era, where 24-hour news and reality formats industrialised panic in the name of ratings. From there, Blaming the Boogeyman follows true crime into the platform age: the boom in prestige docuseries and podcasts, the data trails they generate, and the way streaming services, social media and smart devices fold crime storytelling into a wider surveillance economy. Serial killers, satanic cults, missing children, cartel dramas, home-invasion footage and doorbell-camera clips all pass through the same circuits that now feed predictive policing systems, risk scores and behavioural advertising. Across these periods, the book traces how crime narratives repeatedly step in to manage crises for ruling institutions: deflecting attention from structural breakdowns onto individual offenders; laundering state violence through heroic storytelling; and turning diffuse public anxiety into a dependable market for both security products and media content. True crime appears not just as entertainment but as part of an architecture of control-linking fear to policing budgets, platform engagement metrics and the everyday routines of monitoring that now frame social life. Drawing on media history, industry records and contemporary tech reporting, Blaming the Boogeyman offers a single continuous story: how a century and a half of crime entertainment helped build, stabilise and update the alliance between media, capital and the coercive power of the state. Spans 1888-2025: from Jack the Ripper and H.H. Holmes to Netflix, podcasts and doorbell cameras. Shows how crime coverage sells "law and order" while obscuring structural crises, from depression-era crackdowns to the "war on drugs" and post-9/11 security politics. Connects true crime's familiar icons-serial killers, missing children, satanic panics, cartel dramas-to today's data-mining, predictive policing and always-on surveillance. Combines narrative history with clear analysis, making complex media and technology systems readable without academic jargon. For readers of true crime, media criticism and political nonfiction who suspect the real story isn't just who did it-but who profits from the fear.