If you’e ever read any Horatio Hornblower, or if you are at all a fan of the tales of the Royal Navy in the Nelsonian age, check out David Weber’s series of novels featuring his character Honor Harrington. Think of it as Hornblower in Space. There are about a dozen books in the series, and a slew of other books and anthologies set in the same universe.
Baen’s Free Library has the first book in the series available to download for free. Just go to the Library and search for “On Basalisk Station” by David Weber. It’s available in all popular downloadable formats.