Sisters of the Sword by Maya Snow

I see you blink with surprise. A girl? you are thinking. Surely a girl cannot be asamurai. But you are wrong.

Kimi dreams of being a great samurai warrior, but she and her sister, Hana, are young ladies of ancient Japan, daughters of the Jito of the province. Her future seems clear: Girls do not become samurai.

Then, a murderous betrayal shatters the sisters' world. Suddenly, Kimi and Hana are thrown headlong into a life of warrior codes, deadly swords, and dangerous enemies. Life has swept them into an adventure more heart-pounding than the sisters ever could have imagined . . . and once it has been set in motion, nothing will ever be the same.