The Necklace of the Gods

The Necklace of the Gods , Alison Goodman

Once she was Eon, a girl disguised as a boy, who risked her life to become a Dragoneye apprentice. Now she is Eona - one of just two surviving Dragoneyes - on the run and yet supposedly her country's saviour. And Eona is hiding another, more dangerous secret ...she cannot control her power.