'Cold Shoulder Road' is the latest installment in Aiken's juvenile series set in an alternative Victorian England. Beginning (more or less) with 'The Wolves of Willoughby Chase', continuing through 'Black Hearts in Battersea', 'Nightbirds on Nantucket', 'The Stolen Lake', 'The Cuckoo Tree', 'Dido and Pa', and 'Is Underground' the stories present the adventures of the Twite family as they frustrate attempts by 'Hanoverians' to unseat the Stuart dynasty, who in Aiken's fictional universe still rule Britain.
In the previous novel the heir to the throne, the King, AND the Hanoverian 'pretender' died (together with a large chunk of the population of England's east coast.) This story finds the telepathic Is Twite and her cousin Arun wandering through the miserable ruins of England's flooded coastal towns, trying to find Arun's mother, a devotee of a glum, abusive sect known as 'the silent folk'. Arun's mother is in hiding having discovered the identity of the 'Merry Gentry', a brutal gang of murderous smugglers and child - kidnappers. She has with her a depressed child of mysterious heritage left with the silent folk as a kind of counter-hostage.
Aiken's characters and action is imaginative, but the tone of the series is increasingly despairing.