Robert E. Howard 
The Isle of Pirate´s Doom [EPUB ebook] 

Helen Tavrel, a fierce and cunning pirate, joins forces with the young adventurer Stephen Harmer to escape a deadly fate. Shipwrecked on a perilous island, they must outfight bloodthirsty cutthroats and outwit treacherous allies while searching for hidden treasure. As danger lurks behind every palm tree and the blade of betrayal hangs over them, their survival depends on quick thinking and steel courage.