Vengeance of Orion
by Ben Bova
Orion, the time-tossed eternal warrior, finds himself thrust back to the ancient world of Greece and must prevent the Greek army from destroying the citadel of Troy. If he fails, he will lose the only woman he has ever loved. But if he succeeds, the history of the world will be changed forever. Book 2 of the Orion: Eternal Warrior Series. A stunning SF-fantasy blend from a six-time Hugo award winner. "Nonstop action and mind-bending concepts. . .unforgettable."--Isaac Asimov