Demons of the Deep (Fighting Fantasy #19) by Steve Jackson - Rare Vintage Paperback

As the dread pirate ship Troll strikes, you know that you are doomed. Captain Bloodaxe, the terror of these seas, is known to have no mercy. But you and your crew are courageous sailors, determined to go down fighting.

After a swift and deadly skirmish, YOU are the only survivor from your ship. But Captain Bloodaxe has a terrible fate in store for you - one which will take you far below the waves into the dens of the demons of the deep, in search of the mysterious Black Pearls, your only hope for survival!