Ender's Game
Hugo and Nebula winner, one of the bestselling SF novels ever, on official reading lists from secondary schools to the US Marine Corps; filmed in 2013. Its child-soldier ethics seminar shows no sign of adjourning.
Series Guide
The Ender Saga
From battle school to xenocide and three thousand years of atonement: Card's saga of Ender Wiggin, the child who won a war he wasn't told he was fighting.
In the Guide
Speaker for the Dead
Swept the Hugo and Nebula the year after Ender's Game did — an unrepeated double — and established the 'ramen/varelse' hierarchy of alienness that xeno-ethics discussions in the genre still borrow.