In "The Shadow of the Vulture", Robert E. Howard blends historical fiction with sword-and-sorcery, following the fierce Red Sonya of Rogatino and the knight Gottfried von Kalmbach as they battle the Ottoman forces during the 1529 Siege of Vienna. As the relentless Suleiman the Magnificent seeks conquest, Red Sonya proves to be a warrior as deadly as she is cunning, standing defiant against the vulture of the East.