13 Days of Midnight by Leo Hunt 

When Luke Manchett’s estranged father dies unexpectedly, he leaves his son a dark inheritance: a Host of eight unique, powerful, and restless spirits. Unfortunately, Luke has no clue how to manage them, which the ghosts figure out pretty quickly. Armed with only his father’s indecipherable notes and a locked copy of The Book of Eight, Luke struggles to adapt to his new role as a necromancer. Meanwhile, the increasingly belligerent Host mutinies, possesses Luke’s mother, and forces him out of his own house… Read more.