"The Poison Squad" recounts the riveting true story of Dr. Harvey Washington Wiley's relentless battle against the dangerous adulteration of food in America during the late 19th and early 20th centuries. Leading a crusade that would span three decades, Wiley, as the chief chemist of the U.S. Department of Agriculture, exposed the hazardous substances being consciously added to everyday foods by profit-driven manufacturers. With the support of pivotal figures such as Upton Sinclair and Fannie Farmer, and despite the formidable opposition from unscrupulous corporations, Wiley's tireless efforts culminated in the ground-breaking 1906 Food and Drug Act—affectionately dubbed 'Dr. Wiley's Law.' Deborah Blum's narrative not only illuminates this historic battle for consumer protection but also echoes urgent themes of corporate accountability and governmental duty that resonate profoundly in today's society.