内容简介
AgroupofaliensarriveonEarthaspartofanadvanceinvasionforce.Theirmissionistokidnapasmallsampleofhumansandrunthemthroughaseriesofrigorousteststodetermineiftheywouldmakesuitableslaves.Harper,oneofthealienexperimenters,hasbecemefrustratedwithherplanet'sendlesscycleofconquestandexterminationandbeginstofeelsomesympathyforherhumancaptives.Whiletheprisonersseeaglimmerofhopeinthecompassionatealien,willitbeanyuseinstoppingtheenormousattackfleetjustafewdaysfromEarth?