Sherlock Holmes and the Adler Papers — John Hall

When Sherlock Holmes recovered a compromising photograph and saved the reputation of the King of Bohemia he thought the case was closed. However, the attractive villainess, Irene Adler - now a respectable married woman - summoned Holmes to further assist the King who was now being threatened by even more determined enemies. Holmes and Watson travel to the isolated Kingdom of Bohemia, being imprisoned by friend and foe alike before any solution is in sight.