Ape Man, Space Man
Earth's colonists have spread throughout the cosmos, and have almost divided into two separate species. One is the Swimmers, who have adapted to living in zero-gravity, and regard themselves as the next step in evolution, and those who prefer to live on the surface of a planet as little better than apes. The latter group, the Walkers, are not about to say farewell to the planets they grew up on, and think the Swimmers are not so much advanced as deranged.
Crowell, born a Swimmer but now a Walker by choice, is caught in the middle as the two sides seem headed for war. Then he discovers the true cause of the altercation: a hidden alien race moving behind the scenes to provoke a war so that they can pick up the pieces after the two sides have obliterated each other. And if Crowell cannot head off the war and convince both sides of the existence of the real enemy, both branches of the human race may be headed for untimely extinction.
This full-length novel and much more, fill a huge volume from the master of science fiction adventure.
"Much has been made of the 'sense of wonder' that science fiction evokes, and believe me, there was nothing to evoke that sense quite like the worlds of James Schmitz. . . . Thank you, James Schmitz, wherever you are. And thank you, Eric Flint and Jim Baen, for bringing his Right Stuff back again."
"Take my advice and buy TWO copies of this book! You'll want to lend it to friends and (trust me on this: I have years of experience to back up the observation) once people get their hands on a Schmitz book, they don't let go!"
— Janet Kagan, Hugo-winner and author of Uhura's Song