SOLVED. Donut planet with centaur wars. [s]

[Andy]

Are you thinking of Titan by John Varley

[Rosa]

Titan for the link.

[Andy]

Rosa wrote: "Titan for the link."

Thanks for the link (I was posting from my phone, and couldn't get the link to work).

Titan features an artificial world that is vaguely donut-shaped, and it has centaur-like creatures inhabiting it, who are in eternal war with angel-like creatures. Astronauts from Earth crash on this world and interact with the centaurs.

[Andy]

Glad to help.