Ghost Of A Memory

The final book in the Ghost Protector Trilogy.
As Ghost Protector, Jenny Chang expected to find ghosts in her kitchen but the mother that abandoned her? Never. There is only one thing keeping Jenny from telling her mother to go to hell; her little brother needs her. Something is happening to Tommy that no one can explain. Can Jenny save her brother, face down an ancient evil and avoid getting killed or worse, fired, in the process?