This book examines commercial and personal connections in the early modern book trade in Paris and northwestern France, ca. 1450–1550. The book market, commercial trade, and geo-political ties connected the towns of Paris, Caen, Angers, Rennes, and Nantes, making this a fertile area for the transference of different fields of knowledge via book culture. Diane Booton investigates various aspects of book production (typography and illustration), market (publishers and booksellers), and ownership (buyers and annotators) and describes commercial and intellectual dissemination via established pathways, drawing on primary and archival sources.