The Radleys by Matt Haig
FAMILIES. SOMETIMES THEY'RE A BLOODY NIGHTMARE . . .
Life with the Radleys: Radio 4, dinner parties with the Bishopthorpe neighbours and self-denial. Loads of self-denial. But all hell is about to break loose. When teenage daughter Clara gets attacked on the way home from a party, she and her brother Rowan finally discover why they can't sleep, can't eat a Thai salad without fear of asphyxiation and can't go outside unless they're smothered in Factor 50.
With a visit from their lethally louche Uncle Will and an increasingly suspicious police force, life in Bishopthorpe is about to change. Drastically.