The White Bull — Fred Saberhagen

In the reign of Minos, King of the Cretans, the gods gave proof of their existence: a bull-headed man accompanied by his bronzen servitor strode forth from Neptune''s realm. At last the gods had removed the veils that separated them from their worshippers...or had they?

Strangely enough, the Minotaur forswears all claim to divinity—and his metallic servant cannot speak at all. Instead, he comes to the Greeks bearing gifts of alien knowledge. But Daedelus at least will have cause to beware the teachings of...The White Bull.