Blue at the Mizzen, by Patrick O'Brian
So, like so many other Aubrey/Maturin novels, it ends abruptly, with the main characters rushing off to some new mission. I'll read the published chapters of the unfinished 21st novel, but this is all the closure I expect at this point. Not one of my favorites from the series, although the new midshipman, Horatio Hanson, is endearing. I'll give it a 7.