Sharpe’s Prey and the Expedition to Copenhagen, 1807 by Bernard Cornwell

Sharpe's Prey: Richard Sharpe and the Expedition to Denmark, 1807 - Sharpe is in England, relegated to the menial task of quartermaster in England’s greenjackets.  After exacting his revenge on the manager of the orphanage where he grew up, Sharpe is sent on a secret mission to Copenhagen.  The Danes have a fleet of ships that is wanted by both the French and the British.  Sharpe has been sent to guard the agents who are to bribe Denmark’s king.  But, the agents are double agents and turn on Sharpe as soon as they land.  Confused and alone, Sharpe finds friends in Copenhagen and help the British to attack the city.