The Shadow of Doctor Syn
Shadow of Doctor Syn is the seventh and last in the series of Doctor Syn novels by Russell Thorndike. Published in 1944, it follows the events of Amazing Quest of Doctor Syn. Though it is the last book written in the series it acts as a prequel for the first novel. Thorndike dedicated it to Emma Treckman, with whom he co-wrote the stage play The Return of Doctor Syn.