In A History of the Inquisition of the Middle Ages (Vol. 1-3), Henry Charles Lea offers a sweeping, document-driven anatomy of ecclesiastical coercion from the twelfth to fifteenth centuries. He reconstructs origins, jurisdiction, and procedure-edicts of grace, evidence, torture, penance-while tracking regional variation in Languedoc, Italy, the Empire, and Aragon. Mining papal decretals, conciliar canons, registers, and manuals like Bernard Gui's Practica, his cool, juridical prose fuses legal analysis with social history. Lea (1825-1909), a Philadelphia publisher turned independent scholar, combined polyglot erudition with a positivist, reformist bent. After ill health drew him from business, he built a private research library and corresponded with European archivists. Earlier work on sacerdotal celibacy and canon law primed his interest in institutional mechanisms, and his liberal Protestant milieu sharpened attention to procedure, incentives, and the economic consequences of repression. Recommended to scholars and serious readers of medieval religion, legal history, and church-state relations, this trilogy remains a foundational, meticulously referenced survey. Engage it for its breadth and clarity, and read it critically for nineteenth-century moral framing; few works better reveal how doctrine, law, and power intertwined. Quickie Classics summarizes timeless works with precision, preserving the author's voice and keeping the prose clear, fast, and readable-distilled, never diluted. Enriched Edition extras: Introduction · Synopsis · Historical Context · Brief Analysis · 4 Reflection Q&As · Editorial Footnotes.