Joe W Haldeman

"He went off to war, but the Earth he came back to wasn't the one he left behind Man has taken to the stars. Deep in space, humans discover the fearsome Taurans after a transport ship is destroyed. To combat the threat, humanity sends in the United Nations Exploratory Force-a highly trained unit built for revenge. Conscripted into the service, physics student William Mandella fights for his planet against the alien force light years away. However,...