The Kzin were the mightiest warriors in the galaxy, which they were wasting no time in conquering, one star system at a time. Then those feline lords of creation ran into those ridiculous weed-eating pacifistic apes who called themselves humans. And the catlike Kzin found they had their collective tail caught in a meat grinder. When the mighty Kzin moved in to take over the monkey-infested worlds, they got clobbered. The humans, with their underhanded monkey cunning, turned communications equipment and space drives into weapons that cut the dauntless Kzin heroes into ribbons. And then those underhanded humans gained a faster-than-light drive, and no amount of screaming and leaping could keep the Kzin from losing their first war in centuries of successful conquest. But you can't keep a good warcat down, and the Kzin have by no means given up. New weapons, new strategies, and new leaders: Here they come again and those monkey-boys from Earth had better watch their backs. Once again, it's howling time in Known Space!

The kzin, formerly invincible conquerors of all they encountered, had a hard time dealing with their ignominious defeat by the leaf-eating humans. Some secretly hatched schemes for a rematch, others concentrated on gathering power within the kzin hierarchy, and some shamefully cooperated with the contemptible humans, though often for hidden motives. In war and in uneasy peace, kzin and humans continue their adventures, as told by Hal Colebatch, Paul Chafe, and Michael Joseph Harrington, expanding on the concepts created by New York Times best-selling writer Larry Niven