This is the third volume, and the grand finale, of the trilogy featuring Thomas Marlowe, reformed pirate turned Virginia planter in the 18th century. It moves at hyper-speed, like a caricature of the Conrad short story "Heart of Darkness" where every bend in the Congo River reveals a new, potential catastrophe as the steamer travels upstream. It keeps you on the edge of your seat as Marlowe faces business problems and decides to counteract them by delivering his cargo of tobacco to London himself, in his ship Elizabeth Galley that has been laid up since his last adventure.
There are immediate "hooks" to demand the reader's attention: the ship is no longer armed, so he's planning to depend on speed to avoid the man-made hazards of an Atlantic crossing in wartime, without waiting for the Royal Navy escort that's planned for the rest of the commerce from the American colonies to London. He has made enemies, both in his pirate days and as a privateer, and two of these men are truly remarkable villains, totally committed to destroying him. His wife, Elizabeth, insists on going, adding to the tension, in the belief that the crossing will be fairly easy and she can enjoy the London scene for a while as well as making a profit; she's been managing the estate so she has a legitimate reason to supervise the transactions. One of these enemies recognizes Marlowe in London, after he's unloaded his cargo but before he's been paid for it, and he barely escapes.
It's a fact that piracy is addictive, luring even honest men with the thought of a quick payoff. This is even more believably a temptation if you've been on the wrong side of the law already. Marlowe decides to join the pirates in Madagascar, a move that's ably foreshadowed when there's a shortage of seamen because of the war and when planning the voyage, he needs to hint at the possibility when recruiting his crew. Even so, he has only a handful of men, not enough to man a broadside of big guns even if Elizabeth Galley were equipped with them. But, she has the ports and fittings, such as padeyes for the tackles, and breechings, and he figures he can buy them later with a cache of money from his previous activities.
He and his crew, and his wife too, experience "the pirate round" in the Indian Ocean. The author knows a lot more about this than I do, and I didn't try to check if it's really true that the Moghul Empire had a rich trade in these waters that could support a large number of pirates. However, it makes a great story, demonstrating that the relative wealth and power of cultures has changed a lot since 1710. Most readers will be familiar with piracy on the Spanish Main in the 1600's, and many of the stories about pirates in the Americas date from the 1700's, but somehow I never was exposed to this theater of activity. Robert Stevenson didn't invent the pirate tale, although he certainly made it popular with "Treasure Island", and he didn't make up the fact that pirate crews had a rough and ready sort of democracy that even could trump the racism of a time when slavery was a threat in all cultures. The author either did thorough research or made a lot of it up to appear completely believable to readers. He's mastered the terminology and seamanship details to be authentic to the period. The book has many storms as well as naval battles. Characters get crossed and double crossed and it's suitably bloody without being disgusting.
This book is excellent entertainment and deeply addictive -- you'll be spending lots of time with it. It has an old fashioned, satisfying ending, too. I recommend it highly.