Orson Scott Card -- Ender Series

Orson Scott Card -- Ender Series

Information about this series from Wikipedia--a good source for series lists! But it is a little confusing, so I have make a graphic to show you!

Speaker for the Dead. This novel takes place three thousand years after Ender's Game, although due to relativistic space travel Ender himself (now using his own name, Andrew) is only 36, making him only 25 years older than he was at the end of the Formic Wars.
Two sequels Xenocide and Children of the Mind are more philosophical in nature.

A War of Gifts: An Ender Story was released in October 2007. It is set during Ender's first year in Battle School.

A prequel to Speaker for the Dead named Ender in Exile was released in November 2008. It involves Ender meeting a character from the Shadow saga.

Shadow Saga
Starting with Ender's Shadow four more novels have been released which tell the story of the people whom Ender left behind — this has been dubbed the Shadow Saga (also known as the "Bean Quartet").

Ender's Shadow is a parallel novel to Ender's Game, telling many of the same events from the perspective of Bean, a mostly peripheral character in Ender's Game, while Shadow of the Hegeman, Shadow Puppets, and Shadow of the Giant tell the story of the struggle for world dominance after the Bugger War, in which the Battle School children, as well as Ender's brother, Peter Wiggin, are involved. A sequel book to Shadow of the Giant names Shadow in Flight is planned. It is said to start after Children of the Mind rather than Shadow of the Giant, finish the Enderverse as a whole, tying up the two series, and explain some unanswered questions.