The battle for Commitment Planet
Graham Sharp Paul
The Hammer Worlds have Helfort exactly where they want him. The ultimatum is brutal and precise. Helfort's decision? Bring it on!

by Sylvia Engdahl (2014)
After saving the secret colony Maclairn from terrorists, Terry Steward sets out in his starship to carry on with the plan to spread advanced mind powers to all humankind. Yet opponents of this plan still pose a threat and Steward does not guess that in his quest to find a way to defeat the conspiracy, he will play an even greater role in human history.
Graham Sharp Paul
The Hammer Worlds have Helfort exactly where they want him. The ultimatum is brutal and precise. Helfort's decision? Bring it on!
Andre Norton
When Kincar s'Rud, of mixed Gorthian and Star Lord blood, followed the Star Lords through the shimmering gate that led to alternate universes, he found himself on a Gorth entirely different from the world he had known. At First the Gorthians appeared to be the same, but his former friends turned out to be his enemies. For they were the people his friends might have been, had they made different choices at crucial moments in their lives. And soon Kincar and his real allies would have to confront their own evil, might-have-been selves...
a novelization by Alan Dean Foster
Kirk and Spock, graduates from Star Fleet Academy with contrasting personalities, must work together with their crew to defeat an alien captain intent on destroying all intelligent life in the galaxy.
(by) Frederik Pohl
From back cover Orb Trade paperback May 2011: **Earth is in crisis.** There simply isn't enough water and arable land to support the burgeoning population. As the threat of nuclear war looms, the United States looks to Mars for the precious resources that could save humanity. But somebody must actually journey to the Red Planet to effect a solution, and it would be far too difficult and costly to change Mars to suit man; therefore man must be changed to suit Mars. Roger Torraway didn't plan to be Man Plus, the man who must undergo the surgeries and shaping necessary to enable someone to survive the hostile Martian environment. When he volunteered to serve as an understudy to astronaut Willy Hartnett, Roger never thought he'd actually be called upon. But when Willy dies in a freak accident, Roger becomes humanity's last hope. With every new step toward becoming Man Plus, Roger becomes less and less the man he was to those around him, and more and more something new, something strange and alien. Nothing about him is spared, not even his mind, which must adapt to being... different... if he is to survive. All the while, he is constantly reminded that he must succeed in surviving on Mars -- there's no time to start over before war breaks out -- because the fate of humanity rests on his increasingly nonhuman shoulders. Years after it won the Nebula Award, *Man Plus* is now, more than ever, a powerful, affecting novel about the worldwide environmental crisis that approaches, and the timeless questions of what makes us human.