Arts Business News - A serving police officer with a passion for the work of a famous children s author has used her creative detective skills to help her fulfil a lifetime s ambition to write a mystery book in the style of her childhood fictional heroes. Zoe Billings 41 from Poppleton near York in North Yorkshire is the author of The Mystery of Tully Hall which is based on her love of Enid Blyton s children s adventure stories including the Secret Seven and the Famous Five.