Nightmare! - Gertrude Barrows Bennett

After the 'Lusitania' ship is torpedoed, a man from New York wakes up to find himself in the ocean off an uncharted island. On the magical South Pacific Island, he encounters a brutal wilderness, where plants can eat men and spiders are as big as dining room tables.Before he knows it, he is caught in a dangerous rivalry between two Russian brothers who will do anything to find the philosopher's stone.