Shadows across the Sun - Maya Healy

In book two of this addictive quartet, Kimi and her sister, Hana, have disguised themselves as boys to study at Master Goku's dojo. They prepare themselves to take revenge on the uncle who murdered their father and older brothers by becoming masters of the sword, and their combat skills are deadly.But after their uncle's unexpected arrival and Master Goku's untimely death, the sisters' future is uncertain. Kimi and Hana are forced to go on the run once more, but word has come that their mother and younger brother are alive and waiting for them. Can Kimi, Hana, and their friend Tatsuya survive the perils that lie ahead and defeat their uncle once and for all?