The Silence of the Girls by Pat Barker (Women of Troy #1)

Queen Briseis has been stolen from her conquered homeland and given as a concubine to a foreign warrior. The warrior is Achilles: famed hero, loathed enemy, ruthless butcher, darkly troubled spirit. Briseis's fate is now indivisibly entwined with his.
No one knows it yet, but there are just ten weeks to go until the Fall of Troy, the end of this long and bitter war. This is the start of The Iliad: the most famous war story ever told. The next ten weeks will be a story of male power, male ego, male violence. But what of the women? The thousands of female slaves in the soldiers' camp - in the laundry, at the loom, laying out the dead? Briseis is one of their number - and she will be our witness to history.