Xenocide

Xenocide (1991) is the third novel in the Ender's Game series of books by Orson Scott Card. It was nominated for both the Hugo and Locus Awards for Best Novel in 1992. The title is a combination of 'xeno-', meaning alien, and '-cide', referring to the act of killing; altogether referring to the act of selectively killing populations of aliens, a play on genocide.