1921. With many illustrations from photographs. Mystic Isles of the South Seas is a prequel to O'Brien's White Shadows in the South Seas, and is intended to be part of a trilogy of his adventures in the tropics. He writes: This is a simple record of my days and nights, my thoughts and dreams, in the mystic isles of the South Seas, written without authority of science or exactitude of knowledge. These are merely the vivid impressions of my life in Tahiti and Moorea, the merriest, most fascinating world of all the cosmos; of the songs I sang, the dances I danced, the men and women, white and tawny, with whom I was joyous or melancholy; the adventures at sea or on the reef, upon the sapphire lagoon, and on the silver beaches of the most beautiful tropics.