Ahoy there! If you love a salty yarn as much as I do, then direct your glass here, lads!
Author Victor Suthren has produced a series of four books (novella-length?) via Thunderchild Publishing. The Mainwaring Saga starts with "Royal Yankee"
https://store.kobobooks.com/en-US/ebook/royal-yankee
and continues through "The Golden Galleon," "Admiral of Fear," and "Captain Monsoon."
Although these books are not FREE, $2.99 seems a reasonable price. And since they're EPUB2 DRM-free, you can read them any way you like without resorting to PIRACY!!!!
(See what I did there, matey?)
P. S. Thunderchild is also bringing back some of the Winston Science Fiction young adult novels from the 50's. More on that tomorrow!