Expert storyteller Fred Saberhagen continues his bestselling Berserker series, detailing humanity’s war using the dreaded juggernaut-like devices programmed to destroy all existence in the galaxy.

Around the Twin World planets, Prairie and Timber, Plenipotentiary Gregor is determined to serve his government-even if this means executing innocent Huvean hostages, invaders from another planet-and despite the fact that Gregor’s own granddaughter, Luon, is in love with a Huvean. However now the Berserkers are threatening the Twin Worlds, taking the planets’ president and reprogramming his human brain to suit their violent agenda. In support of the Huveans, inside a desperate reprieve, can save the Twin Worlds’ populace from annihilation.