Francesco Guicciardini (b. 1483–d. 1540) was a Florentine patrician and papal administrator who wrote numerous works on the history and government of his native city and recorded the era of the Italian Wars in his monumental Storia d’Italia. His writing was inspired not by abstract principles but by his own practical experience, whether as Florentine orator in Spain from 1512, or in the service of the Medici popes Leo X and Clement VII, as governor of Modena and Reggio from 1516, as commissary general of the papal army (1521), as president of the Romagna (1524), and as a lieutenant general (1526). The sack of Rome by imperial forces in 1527 destroyed the political system in which he was so prominent a player. He was too close to the Medici to be trusted by the leaders of Florence’s “Last Republic,” from which he was exiled in 1530. His career never fully recovered and he devoted his final years to writing the Storia d’Italia. None of his works were published during his lifetime, meaning that his literary reputation has been an entirely posthumous creation, but his place in the pantheon of Italian Renaissance literary figures is now so secure that his name is readily linked with that of his friend and neighbor in Florence, Niccolò Machiavelli. How and when Guicciardini’s works were published, together with their subsequent impact, is the unifying theme running through this bibliography, which aims to guide the student through the maze of texts and toward the most appropriate editions, commentaries, and analyses. Reference Works acts as a prelude to the main biographical section, Lives and Letters. Guicciardini’s oeuvre is introduced in Collected Works, and then explored in the order in which it became available to the reading public, beginning with the Storia d’Italia, the Ricordi, and works on Florentine History and Politics, all three sections being subdivided into “Texts” and “Analysis.” Minor Works and Correspondence reflect an apparently insatiable desire to publish every word Guicciardini wrote, down to his marginal notes. The resulting body of work is so extensive as to put it well beyond the needs of most students, for whose convenience volumes of Extracts have been identified. Thereafter, the reader is guided through those Journals and Collections of Papers (whether Single-authored or Multi-authored) of greatest relevance for this subject. Guicciardini’s Reputation and Impact is apparent throughout the bibliography, but is nevertheless highlighted in its concluding section.