Dray Prescot must answer to the Star Lords for his disobedience. But the Star Lords argue over him and Dray is dropped accidentally in a walled garden. He is lost. Even the Star Lords don't know where he is. He knows he is on the splendid if horrific planet of Kregen, and in the continent of Loh, but nothing is familiar. He must find his way back to Makilorn, and from there to Tarankar to train an army to repel the Shanks...

Scorpio Invasion is the fortieth book in the epic fifty-two book saga of Dray Prescot of Earth and of Kregen by Kenneth Bulmer, writing as Alan Burt Akers. The series continues with Scorpio Ablaze.