In reading order
Ender's Game
Orson Scott Card
Ender's Game Alive: The Full Cast Audioplay
Orson Scott Card
Speaker for the Dead
Orson Scott Card
Xenocide
Orson Scott Card
Children of the Mind
Orson Scott Card
First Meetings
Orson Scott Card
A War of Gifts
Orson Scott Card
Ender in Exile
Orson Scott Card
Ender's Game
Orson Scott Card