Darker

Video scriptwriter Richard Young is looking forward to a week at home with his wife and their little daughter. He thinks it's going to be a pleasant time of barbecues and lazy summer days. It isn't. It is going to be hell.
Because the stranger who arrives at their home, begging to be driven to the nearest police station, is being hunted. Hunted by something that cannot be seen, cannot be heard - yet which has the power to move across the land crushing flat everything in its path. Stalking and killing remorselessly.

Within minutes, Richard Young, his family and the stranger (who is not the innocent victim he seems) are being pursued relentlessly by a malignant occult force that pounds and pulps its victims like the Hammer of God itself...

Darker, first published in 1996, is another gripping horror from Simon Clark.