The King's Demon

From the back cover: "YOU are Robin of Sherwood, son of Herne the Hunter, champion of the poor and oppressed. As you go through the book you make your own choices and use your skill and judgement to outwit your old enemy, the corrupt Sheriff of Nottingham and his loathsome bully servant, Sir Guy of Gisburne. Your object is to overpower a new opponent, Sir Jean de Melusine, a cunning and evil ally of the Sheriff. But Sir Jean has magical powers, and you will need all your wit and strength to combat the Forces of Darkness that he plans to unleash!" The first of two gamebooks published under this system.