An eight-year-old boy. His Mum. A Saturday in Ashford, Kent, in the 1960s. They walk a route that is familiar but unknowable: through Beaver Green and Boxley, past the dry Hubert Fountain in Victoria Park, across railway lines as the Golden Arrow flashes below, into Elwick Road market, up Bank Street, around Church Yard, past Rabson’s, Crump’s and the Odeon, through back doors, family houses, bus routes and Saturday-night club rooms. To the child, it is simply Saturday. There are bananas in Mum’s bag, toy soldiers in shop windows, Doctor Zhivago music in the cinema, meat pies at Nanny Austen’s, marbles with cousins, Vimto in the working men’s club, one-armed bandits, cockles and whelks, Salvation Army tins and the strange mystery of how a bus driver knows where to stop when Mum has only told the conductor. But beneath the errands, shops and family rituals, another journey is already taking place. The boy is being carried towards the move from Ashford to Broadstairs — from one childhood map into another. Only years later does he understand that this was the real thirteenth door. Part ghost story, part memoir, and part love letter to vanished ordinary places, The Thirteenth Door is a haunting of childhood memory, lost Ashford, family routes and the thresholds we pass through before we know what they mean.