Transit to Scorpio — Alan Burt Akers

On the planet Kregen that circles Antares, the brightest star of the Constellation of the Scorpion, two forces contend for the world's destiny. One of them, the Savanti, called in a human pawn from far-away Earth.His name is Dray Prescot, and only the Savanti know his role.Dray Prescot confronted a fabulous world -- barbaric, unmapped, peopled with both human and non-human races. But there were always the Star Lords to watch and check the Savanti's plans. And it soon turned out that Dray Prescot himself had to make a decision that would change him from a mere pawn to a bolder piece on the planetary chessboard...