Farnol Jeffery Farnol 
Adam Penfeather, Buccaneer: His Early Exploits [EPUB ebook] 

This tale regards the piratical adventures of Adam on the Spanish Main, together with his companion Antonia who has gone adventuring in the guise of a boy. Even critics who’d been hard on Farnol were won over by this one. The best book from his last period, it is something of a sequel to, & making a trilogy of Black Bartlemy’s Treasure and Martin Conisby’s Vengeance despite having a different central hero.