Daughter of the Sword (Novel of the Fated Blades, 1) [Bein, Steve]

As the only female detective in Tokyo's most elite police unit, Mariko Oshiro has to fight for every ounce of respect, especially from her new boss. But when he gives her the least promising case possibleNthe attempted theft of an old samurai swordNit proves more dangerous than anyone on the force could have imagined.