A. M. Howell Biographie Contributions de A. M. Howell Auteur Mysteries at Sea: The Royal Jewel Plot A. M. Howell Usborne The Garden of Lost Secrets A. M. Howell Usborne Mysteries at Sea: Peril on the Atlantic A. M. Howell Usborne Mysteries at Sea: The Hollywood Kidnap Case A. M. Howell Usborne