I've got all the Aubrey / Maturin novels - great reads if you can take the old style english writing and the technical sailing stuff. You'll now your an official Lucky Jack Aubrey geek when you start getting the old english jokes.
Another GREAT series in the genre are the Alan Lewrie novels by Dewey Lambdin. Start out with the Kings Coat and go from there... lots of action (both with Cannons and with the Capt's patented french cundums).
Hornblower series is also pretty good, but for a younger crowd.
If you want some other heavy duty period action (on land), try the Sharpe series by Bernard Cornwell (sp). A lot of action in those books, and they are a quick read. Think it starts with Sharpe's Rifles, and there are a bunch of them.
EagleDNY
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