Speculative fiction is a broad umbrella category of narrative fiction referring to any fiction story that includes elements, settings and characters whose features are created out of imagination and speculation rather than based on attested reality and everyday life. That encompasses the genres of science fiction, fantasy, science fantasy, horror, alternative history, and magic realism.
Torpedoed by a German U-boat during World War I, a group of adventurers
are marooned on Caprona, a hidden island suspended in time and
inhabited by dinosaurs, cavemen, and scattered bands of human beings.
Will the adventurers be able to escape?