Nobody's Princess by Esther Friesner

Helen of Troy might have grown up to be one of the world's most celebrated beauties, but Friesner imagines her childhood as that of a tomboyish youth who learned swordfighting with her brothers, horseback riding with Atalanta, had an awkward adolescence, and set sail, while undercover, on a ship to further her adventures.

Not a bad book, but not award worthy.

Nay