Mammoth Book of New Sherlock Holmes Adventures Presents 'the Adventure of the Bulgarian Diplomat'

Holmes receives an anonymous letter on behalf of a royal client, requesting his services. After he is paid a visit from a Turkish nobleman and advised to handle the case with extreme sensitivity Holmes discovers he is dealing with a dangerous political crisis that leaves him responsible for preventing a war. The only other issue Holmes's must bear in mind is how much of the truth he has been told.