Two teenagers flee from a hypertechno future world with cyber servants and a ruling class that lives for a full century. Winner of the 1989 Hugo Award.
The assassination of the controller on Cyteen threatens to throw the planet into chaos, and the planet's fate rests with the controller's clone.
The spying, brainwashing, training tapes, and coercion run amok at Reseune, the city-sized laboratory on Cyteen where almost-human azi are grown and trained. Warped young scientist Justin and his azi, Grant, depend on each other for support. Little Ari Emory depends on her own azi: nursemaid Nellie and bodyguards Florian and Caitlin. In Cyteen: The Rebirth, the second part of the Cyteen trilogy, Ari learns why her life has been more unusual than some and why her mother was whisked away when she was 7 years old. She is a clone; and as if that weren't enough, her whole life is a laboratory experiment, an attempt to recreate the keen mind and cruel personality of the original Ariane Emory by recreating her past in Ari's present. As she grows older and wiser, Ari battles with her politically-minded relatives, Reseune powers-that-be, her responsibility to her azi, and plain old teenaged angst.
The Cyteen trilogy is quite possibly my favorite of Cherryh's work.