On the planet Kregen that circles Antares, the brightest star of the Constellation of the Scorpion, two forces contend for the world's destiny.

Suns of Scorpio
The second book of the Dray Prescot series.

Slave of the colossus builders or scourge of the Inland Sea?

Both roles awaited Dray Prescot on his return to Kregen. Torn between two contending forces, the Star Lords and the Savanti, Prescot himself wanted only to find his beloved, the Princess Delia of the Blue Mountains. But the powers that had drawn him across interstellar space to the world that orbited the red and green suns in the Constellation Scorpio had set him a task, the nature of which even he could not fully comprehend...

Swordships of Scorpio [Dray Prescot #4]
The fourth book of the Dray Prescot series. What does a man do when fate makes him the protector of the royal head of the land of his enemies? If it is Dray Prescot, Earthman on Antares, he sets aside his quest to do his duty. His duty was to reach Vallia and his princess Delia and help her claim her throne. His duty was to defend Vallia's ancient foe and place its rightful heir on its throne -- sworn to attack Vallia. So when the third force, the pirate fleets known as the swordships came between the two contending demands, Dray sees that only by following his own personal star could the contradiction be resolved...

Transit to Scorpio
Book One of the Dray Prescot series. 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...

Warrior of Scorpio [Dray Prescot #3]
The third book of the Dray Prescot series. Once again in the grip of the Star Lords of the Constellation Scorpio, Dray Prescot finds himself torn from the battles of the Inner Sea for a mission in the air. For it was now his mission to carry his beloved Delia by airboat to that far kingdom, Vallia, from whence she had come. But the route lay across the gaunt mountains and the shadowy jungles of the Hostile Territories -- and there Dray was to be plunged among stranger peoples and more fantastic challenges than even his Kregen princess had known...