Viscous Circle
by Piers Anthony
Alternate cover edition can be found here
In the far, far future the bloodthirsty Solarians, in their rage to find the mysterious Ancient Site, are determined to wipe out the Bands, a strange and beautiful species whose society is an anarchy of peace. Only Rondi, the whirling green Band, can save his race, for he has a singular and awesome knowledge. But suddenly Rondi makes a shocking discovery about his identity - a discovery that may cost him his honor, his beautiful lover Cirl, even his very life...The Galactic annihilation is beginning!
In the far, far future the bloodthirsty Solarians, in their rage to find the mysterious Ancient Site, are determined to wipe out the Bands, a strange and beautiful species whose society is an anarchy of peace. Only Rondi, the whirling green Band, can save his race, for he has a singular and awesome knowledge. But suddenly Rondi makes a shocking discovery about his identity - a discovery that may cost him his honor, his beautiful lover Cirl, even his very life...The Galactic annihilation is beginning!