The incredible, canonical, thrill-a-minute series set in Edgar Rice Burroughs' astounding prehistoric world of Caspak comes to a thunderous conclusion! In this official sequel to the original novel, heroes Bowen Tyler and Lys la Rue Tyler battle their way through savage Caspak, and with the aid of See-ta and Co-tan, they have finally escaped the brutal tribe of prehistoric men who have been hunting them. But their troubles are only beginning when Lys is abducted by one of Caspak's most despicable, hideous humanoids, a corpse-like, winged Wieroo! Join the race against time, set in a world of rampaging dinosaurs and high-adventure, as only Edgar Rice Burroughs could have imagined!