Ender’s Game (The Ender Quintet) by Orson Scott Card
The Female Man (Bluestreak) by Joanna Russ
Consider Phlebas (Culture) by Iain M. Banks
Red Mars by Kim Stanley Robinson
Falling Free by Lois McMaster Bujold
Little Brother by Cory Doctorow
Hyperion (Hyperion Cantos) by Dan Simmons