When a decline in global fertility ensued, it was the creation of these near-perfect human copies called teknoids that helped to prevent the utter collapse of society.Though she has always been aware of the existence of teknoids, it is not until her first day at The Lady Maud High School for Girls that Tania realizes that her best friend, Siân, may be one. Returning home from the summer holiday, she is shocked by how much Siân has changed. Is it possible that these changes were engineered by Oxted? And if Siân could be a teknoid, how many others in Tania’s life are not real?Driven by the need to understand what sets teknoids apart from their human counterparts, Tania begins to seek answers. But time is running out. For everyone knows that on their eighteenth “birthdays,” teknoids must be returned to Oxted—never to be heard from again.

    Gone. Except for the young.There are teens, but not one single adult. Just as suddenly, there are no phones, no internet, no television. No way to get help. And no way to figure out what's happened.Hunger threatens. Bullies rule. A sinister creature lurks. Animals are mutating. And the teens themselves are changing, developing new talents—unimaginable, dangerous, deadly powers—that grow stronger by the day. It's a terrifying new world. Sides are being chosen, a fight is shaping up. Townies against rich kids. Bullies against the weak. Powerful against powerless. And time is running out: On your 15th birthday, you disappear just like everyone else...