Its civilisation was old when Terrans were learning to walk upright.
Where blood-feud is a fact of death and torture a noble game.
Still, Terran Intelligence thought that the Terran Peace was secure on Wolf - until strange reports of alien unrest started filtering in to Terran Headquarters, reports of weird events that made even the exotic customs of Wolf seem tame.
Only one Terran agent knew Wolf well enough to pass undetected in the alien Dry-Towns, but he had ruined his usefulness long ago, by acculturating himself so successfully that a native blood-feud was called out against him: Once he left the safety of the Terran Enclave, he would be killed on sight. And yet, in the end, only the scarred and bitter man who loved Wolf as his home could discover the secret of... THE DOOR THROUGH SPACE