Lychford, book 1: Witches of Lychford
Paul Cornell2015

Traveler, Cleric, Witch.

The villagers in the sleepy hamlet of Lychford are divided. A supermarket wants to build a major branch on their border. Some welcome the employment opportunities, while some object to the modernization of the local environment.

Judith Mawson (local crank) knows the truth -- that Lychford lies on the boundary between two worlds, and that the destruction of the border will open wide the gateways to malevolent beings beyond imagination.

But if she is to have her voice heard, she's going to need the assistance of some unlikely allies...