Impostors

Frey and Rafi are inseparable... two edges of the same knife. But Frey's very existence is a secret.
Frey is Rafi’s twin sister — and her body double. Their powerful father has many enemies, and the world has grown dangerous as the old order falls apart. So while Rafi was raised to be the perfect daughter, Frey has been taught to kill. Her only purpose is to protect her sister, to sacrifice herself for Rafi if she must.
When her father sends Frey in Rafi’s place as collateral in a precarious deal, she becomes the perfect impostor — as poised and charming as her sister. But Col, the son of a rival leader, is getting close enough to spot the killer inside her. As the deal starts to crumble, Frey must decide if she can trust him with the truth... and if she can risk becoming her own person.
With Impostors, master storyteller Scott Westerfeld returns with a new series set in the world of his mega-bestselling Uglies — a world full of twist and turns, rebellion and intrigue, where any wrong step could be Frey’s last.
Scott Westerfeld
Scott Westerfeld (born 1963) is an American author of science fiction. He was born in the U.S. state of Texas and now divides his time between Sydney, Australia and New York City, USA.
The Risen Empire and The Killing of Worlds are parts one and two of the same book, originally titled Succession. In 2005 it was published in the UK as one book under the title The Risen Empire.
So Yesterday has been optioned to be made into a film by one of the producers of Fahrenheit 9/11 and Bowling for Columbine.
The Uglies series was optioned by Twentieth Century Fox as a possible film series in 2006.
In 2001, Westerfeld married Australian author Justine Larbalestier.
Impostors
Series contains 4 primary works and has 4 total works. Current series reading order on below.
Main series Uglies