Sinja Book 1
All Sinja ever wanted was to become a Sinjitsu Master - the most powerful and terrifyingly evil assassins in the land. But when he discovers that his Sensei is dead, his hopes and dreams are cast into the wind. With the help of a powerful Oni spirit, a celestrial monkey, and a lot of good intentions, he must find a way to gain entrance to the Underworld, hunt down his Sensei's spirit, and force him to reveal the secrets of Sinjitsu. Only then will he necome a true Sinjitsu Master.