Market day in Ashfordly comes but once a week — and that’s more than enough for Constable Nick.

Every Friday, traders and punters flock to the cobbled marketplace. All are eager to snag a bargain — a gourmet cheese or a pet snake from Greengrass’s exotic emporium.

Too bad the place is a magnet for pickpockets, carousers and troublemakers of every description. This week, Constable Nick is faced with:

A hand grenade among the potatoes.

An unstoppable drunkard named Twelve-pint Pete.

A UFO floating in Aidensfield airspace.

Can he find a way to keep the peace — and save the proud tradition that is market day in Yorkshire?

The brilliantly entertaining and heartwarming books behind the hit 90s TV series Heartbeat. One of the top ten most watched shows of the decade.