Delve into the thrilling world of 'The Professionals' with this complete collection of paperback books 1-15 by Ken Blake. A must-have for aficionados of crime and thriller fiction, each book transports you to the gritty heart of 1970s London, where espionage and action collide. Published by Sphere, these novels capture the essence of the era with their vintage charm. As you flip through the pages of this classic series, you'll be drawn into a web of suspense and intrigue that's as compelling today as it was at the time of their publication.