John Payne Collier (1789-1883), one of the most controversial figures in the history of literary scholarship, pursued a double career. A prolific and highly influential writer on the drama, poetry, and popular prose of Shakespeare's age, Collier was at the same time the promulgator of a great body of forgeries and false evidence, seriously affecting the text and biography of Shakespeare and many others. This monumental two-volume work for the first time addresses the whole of Collier's activity, systematically sorting out his genuine achievements from his impostures.