Полиморф.

"Полиморф" - дебютный роман Скотта Вестерфельда. 

Lee can change her gender and ethnicity at will, allowing her to slip freely through New York society. She thought she was the only "polymorph"...until a chance encounter with another of her kind. Now it's up to Lee to stop the renegade shapeshifter who is plotting to control the information technology in a postindustrial world, where illusion wears the face of reality, and the prize is power absolute....

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