Joss, Hero, and Drake are prentice paladeros, cowboy-knights that ride dinosaurs and fight to protect their Kingdom. Now, they face the ultimate battle: themselves. The Kingdom of Ai is under siege. The Shadow God and his Court of Thralls are ready for war, and Joss and his brethren have a critical mission--to marshal the forces that will defend their land. But not everyone is willing to heed the call, least of all the former paladeros known as the...