In História social do LSD no Brasil, Júlio Delmanto analyzes the details of the first court case for trafficking lysergic acid diethylamide in the country, which took place thirteen months after the dictatorship was hardened by AI-5. The book covers the long road between the discovery of LSD in Switzerland in 1943 and the arrest of a young artist in the city of São Paulo in 1970, a case crossed by episodes of torture and journalistic sensationalism. In this journey, the author discusses the first uses of the substance in Brazil - in scientific research that, as early as the 1950s, sought to investigate the effects of the new drug on the human mind - and the political and social background that made acid an icon of counterculture in the 1960s and 1970s, playing a catalyzing role in artistic movements that influenced generations.