Angel Sanctuary (Angel Sanctuary #4)

Setsuna Mudo is a mixed-up high school student who had gotten up on the wrong side of God. He is the reincarnation of an angel who has rebelled against heaven. Now the Angels want him dead, the demons want him to lead the revolution, and he just wants a clue to how the world works.

Sara, Setsuna's beloved sister, is dead, and Tokyo is a moment away from being utterly destroyed - and this chapter of Setsuna's life is just beginning. Meanwhile, the worst angel in the nine spheres is about to make a power grab and take control of heaven!