The Mauritius Command - Patrick O'Brian - Bog

In The Mauritius Command, Captain Jack Aubrey is ashore on half-pay without a command until his friend, occasional intelligence agent Stephen Maturin, arrives with secret orders for Aubrey to take a frigate to the Cape of Good Hope under a Commodore''s pennant. But the difficulties of carrying out his orders are compounded by two of his own captains: one a pleasure-seeking dilettante, the other liable to provoke the crew to mutiny.