UGLIES TRILOGY by Scott Westerfeld

Uglies (Uglies #1)

Tally Youngblood is about to turn sixteen, and she can't wait for the operation that turns everyone from a repellent ugly into a stunningly attractive pretty and catapults you into a high-tech paradise where your only job is to party. But new friend Shay would rather hoverboard to "the Smoke" and be free. Tally learns about a whole new side of the pretty world and it isn't very pretty. The "Special Circumstances" authority Dr Cable offers Tally the worst choice she can imagine: find her friend and turn her in, or never turn pretty at all. The choice Tally makes changes her world forever.

Pretties (Uglies #2)

Gorgeous. Popular. Perfect. Perfectly wrong.

Tally has finally become pretty. Now her looks are beyond perfect, her clothes are awesome, her boyfriend is totally hot, and she's completely popular. It's everything she's ever wanted.

But beneath all the fun -- the nonstop parties, the high-tech luxury, the total freedom -- is a nagging sense that something's wrong. Something important. Then a message from Tally's ugly past arrives. Reading it, Tally remembers what's wrong with pretty life, and the fun stops cold.

Now she has to choose between fighting to forget what she knows and fighting for her life -- because the authorities don't intend to let anyone with this information survive.

Specials (Uglies #3)

Special Circumstances: The words have sent chills down Tally's spine since her days as a repellent, rebellious ugly. Back then Specials were a sinister rumor -- frighteningly beautiful, dangerously strong, breathtakingly fast. Ordinary pretties might live their whole lives without meeting a Special. But Tally's never been ordinary.

And now she's been turned into one of them: a superamped fighting machine, engineered to keep the uglies down and the pretties stupid.

The strength, the speed, and the clarity and focus of her thinking feel better than anything Tally can remember. Most of the time. One tiny corner of her heart still remembers something more.

Still, it's easy to tune that out -- until Tally's offered a chance to stamp out the rebels of the New Smoke permanently. It all comes down to one last choice: listen to that tiny, faint heartbeat, or carry out the mission she's programmed to complete. Either way, Tally's world will never be the same.

Extras (Uglies #4)

It's a few years after rebel Tally Youngblood took down the uglies/pretties/specials regime. Without those strict roles and rules, the world is in a complete cultural renaissance. "Tech-heads" flaunt their latest gadgets, "kickers" spread gossip and trends, and "surge monkeys" are hooked on extreme plastic surgery. And it's all monitored on a bazillion different cameras. The world is like a gigantic game of "American Idol." Whoever is getting the most buzz gets the most votes. Popularity rules.

As if being fifteen doesn't suck enough, Aya Fuse's rank of 451,369 is so low, she's a total nobody. An extra. But Aya doesn't care; she just wants to lie low with her drone, Moggle. And maybe kick a good story for herself.

Then Aya meets a clique of girls who pull crazy tricks, yet are deeply secretive of it. Aya wants desperately to kick their story, to show everyone how intensely cool the Sly Girls are. But doing so would propel her out of extra-land and into the world of fame, celebrity...and extreme danger. A world she's not prepared for.