Grey Dawn The Dulcie Schwartz Feline Mysteries, Book 6.

Harvard grad student Dulcie Schwartz and the ghost of her dead cat Mr. Grey return to keep the campus safe from an attacker who may not be totally human. When doctoral candidate Dulcie Schwartz thinks she hears a wolf late one night on her way to her departmental office, she tries to dismiss it. But the noises, the dark building, and an unnerving sighting of her adviser-looking strangely inhuman in the moonlight-all combine to thoroughly give...