When teen Sherlock and American tutor Amyus Crowe visit Sherlock’s brother Mycroft in London, they expect polite lunch. Instead, Mycroft holds a knife over a dead body in a locked room. Threatened with the gallows, Mycroft needs Sherlock. The search for the truth goes from a London railway station for dead bodies to frozen Moscow. Paperback , 286 pages Published June 2011 by MacMillan Childrens (first published 2011)