Ken Follett wrote his first international bestseller, Eye of the Needle, when he was 25 years old. He has since been one of the most consistent international best-selling authors, with approximately 130 million copies of his books sold worldwide. His manifold influences on the thriller genre includes the pioneering use of strong female characters in espionage stories and the development of the historical thriller as a new form of novel, exemplified by Winter of the World (2012). This book is an investigation of Follett's development as an author, and of the craft of writing and the negotiation of serious versus popular literary value, from his earliest short stories and screenplays through his mature thrillers and entertainment fiction. Unpublished materials are also considered, including his notes, business and personal correspondence, unpublished drafts, journal entries and outlines. Follett's dramatic shift to writing historical fiction may be his most enduring legacy.