The Shelter by John Fallon

3.30

On a star-filled night, homeless Thomas seeks warm shelter. Still grieving his late wife, ruined and desperate, he comes across a vast house with the lights on and an inviting open front door. But the next morning, the premises will not let him leave. Destiny has brought Thomas to this place and now he must survive a very personal ordeal. For what appeared a safe haven turns out to be something far more malevolent.