Ben Bova — Vengeance Of Orion

Methuen 1988 Paperback, 432pp. Orion 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. The stunning sequel to Orion. Foxing to the first few pages. (ISBN: 9780413175700). Good.