The Distant Ocean — Philip K. Allan

Newly returned from the Battle of the Nile, Alexander Clay and the crew of the Titan are soon in action again, just when he has the strongest reason to wish to abide in England. But a powerful French naval squadron is at large in the Indian Ocean, attacking Britain's vital East India trade. Together with his friend John Sutton, he is sent as part of the Royal Navy's response. On route the Titan runs to ground a privateer preying on slave ships on the coast of West Africa, stirring up memories of the past for Able Sedgwick, Clay's coxswain. They arrive in the Indian Ocean to find that danger lurks in the blue waters and on the palm-fringed islands. Old enemies with scores to settle mean that betrayal from amongst his own side may prove the hardest challenge Clay will face, and a dead man's hand may yet undo all he has fought to win. Will the curse of the captain's nephew never cease to bedevil Clay and his friends?