A major reinterpretation of the English Enlightenment that reveals how its radical ideas were shaped by a thriving literary underground In early eighteenth-century England, books could be deadly, and dangerous ideas had to circulate in secret. Even though pre-publication licensing had ended in 1695, the book trade remained subject to government surveillance and harassment. Those caught producing seditious, blasphemous, or treasonous works risked beatings, prison, fines, and even death. Yet, despite such intense censorship, clandestine networks of daring and ingenious authors, printers, and booksellers enabled political debates, religious controversies, and literary experiments to flourish. In Unlicensed , Joseph Hone takes readers behind the scenes of this remarkable literary underground, following texts from manuscript to sale—through false imprints, hidden presses, and cross-border smuggling routes—and showing how censorship shaped the culture of enlightenment England. Drawing on extraordinary evidence, including informant reports, interrogation transcripts, and forensic bibliographical analysis, Unlicensed offers a vivid panoramic account of the early eighteenth-century underground book trade, and uncovers how illicit books were produced, disguised, distributed, and read. Printers emerge as active agents shaping which works reached the reading public, while back-alley distributors, booksellers, and even criminal gangs ensured that forbidden books circulated widely. At the same time, anonymous and illicit texts cultivated a discerning, skeptical readership attuned to questions of attribution and authority. By mapping the interactions between authors, printers, publishers, booksellers, readers, spies, and government enforcers, Unlicensed demonstrates that censorship was not merely a constraint but a formative force in the early eighteenth-century English literary world. The result is a fresh perspective on enlightenment England, revealing how law, commerce, and society together shaped the circulation of ideas and the cultures of writing and reading.