The Good Teacher: A gripping thriller from the Kindle top ten bestselling author of ‘The Perfect Neighbours’. Rachel Sargeant

to rattle his cage.”

      “The night club?” I’ve made a fair few drunk and disorderly arrests outside. “Will it be open at this time of day?”

      “Calling it a night club is like saying the Danescott Kebab House is a gourmet restaurant. The Dynamite is little more than a strip joint. The sort of facilities McKenzie offers have a steady supply of punters twenty-four seven. It’s supposed to be members only before six, but McKenzie wouldn’t let a little thing like the licensing laws get in his way.”

      As expected, Matthews drives in silence along the endless rows of industrial units and warehouses. This time I make no attempt at conversation. Don’t want to give him more ammunition. I intend to limit his weaponry to the Agatha tag.

      The silence gives me a chance to mull over the events of the morning. The chat with Linda Parry answered a few questions. Poor Gaby, how could so much tragedy attach itself to one person? The Brocks’ circus-themed room was intended for the baby they lost, and the cage in the study was for the recently departed pet cockatiel. Pipkin is the kind of daft name I might have given one of my teddy bears, if they weren’t named after Christie characters.

      And Linda Parry displays her sorrow whereas Gaby Brock conceals hers. I remember how Mum and I clung to each other, wailing long and loud, when my grandfather died. I can’t imagine keeping grief to myself. Other emotions – terror, rage, despair – I can hold those, but not grief.

      We turn right into Minster Meadow, the dual carriageway that forms the eastern approach to Penbury town centre. It’s bordered by elegant town houses, many displaying discreet Bed and Breakfast notices. Two pubs stand on either side of the road like a pair of bookends. Hanging baskets with patriotic displays of salvia, alyssum and lobelia front them both, while banners proclaim their respective commitments to family menus and Sky Sports.

      Matthews slows down as Minster Meadow narrows to two lanes and becomes dwarfed by the minster itself. The 800-year-old walls stand solid and clean on velvety green lawns. No errant daisies or incipient clover here, thanks to the Briggham diocese grounds maintenance team. Although I see the minster as an ancient monument rather than a place of worship, I rarely visit. Crossing its slavishly swept threshold is like trying to penetrate a precious jewel. I’ve no business defiling its stone-carved floor with my size eight deck shoes. I content myself with frequent trips to the adjoining refectory for spaghetti bolognaise followed by apple crumble and custard.

      Beyond the minster is a parade of shops. I make out a hardware store, a bank and a sandwich bar. Across a side road is a high-wire fence around a school playground. Swan Academy. No unauthorized entry.

      We drive over the East Bridge, built fifty years earlier to span the River Penn. At this time of year its vast stone arches seem ostentatious for the grubby stream of water trickling below. However, by October, heavy rains in the Welsh mountains will swell the river and hide its banks. They currently stand naked and filthy. Another week of drought and they’ll reveal the river’s insides: rusted pushchairs, buckled bicycle frames, fleshless mattresses.

      The town centre proper begins after the bridge. There’s a multi-storey car park, an antique shop, two estate agents, a health food shop, three pubs – without hanging baskets – and any number of shoe shops. And then, on the right-hand side, is the Dynamite Club.

      Matthews pulls into the deliveries bay in front of the club. “We ought to be able to arrest him just for that.” He shakes his head at a neon sign that promises Live Music