Echoes in the Night - Cult of the Endless Night, #4

Evil lurks beneath the streets of Boston. And only Shane Ryan can stop it.It stalks the shadowy tunnels beneath the city. It strikes without warning. It kills without a sound. But someone has come to end it. Ghost hunter and retired Marine, Shane Ryan. When a contact from a previous case reaches out for help, Shane soon finds himself searching the tent cities and homeless encampments of the sprawling city, hot on the trail of a merciless killer.
What he finds is an animalistic spirit, driven into a frenzy by bloodlust. And a connection to the sinister cult of the Endless Night. Shane suspects the cult are seeking to harness this deadly entity for their own nefarious ends. But to stop the killer ghost, he must form an uneasy alliance with a cult member. Can Shane trust this new ally?Or will he meet his end as he comes face to face with the ultimate supernatural predator?