Monster In The Mines (Serial Chillers Book 2), Jennifer Killick

Welcome to Hazard.

An ordinary town where strangeness is a way of life. A place where nothing is what it seems and where things really DO go bump in the night … Travis, Zayd, Danielle and Selene have been drawn together to investigate the strange goings-on in their home town. Sinkholes, disappearances and weird creatures are spotted lurking in the darkness.

This time, their investigations lead them to the mysterious mines that run underneath Hazard. But a creature is lurking down there in the darkness. And it's hungry for flesh …