Part biography of a book, part scientific exploration, part bibliographic detective story, The Book Nobody Read recolors the history of cosmology and offers a new appreciation of the enduring power of an extraordinary book and its ideas. Prodded by Arthur Koestler’s claim that when it was first published nobody read Copernicus’s De revolutionibus —in which Copernicus first suggested that the sun, not the earth, was the center of the universe—renowned astro-historian Owen Gingerich embarked on a three-decade-long quest to see in person all 600 extant copies of the first and second editions of De revolutionibus , including those owned and annotated by Galileo and Kepler. Tracing the ownership of individual copies through the hands of saints, heretics, scalawags, and bibliomaniacs, Gingerich proves conclusively—four and a half centuries after its publication—that De revolutionibus was as inspirational as it was revolutionary.