Shadow of a Doubt - Facts

 At the beginning of the book Cara lives in Colchester where she was her job. Colchester is a city in northeastern Essex.

Cara lived in Morecambe after leaving the psychiatrist hospital where her foster parents lived. Morecambe is a seaside town and civil parish in the City of Lancaster district of Lancashire.

Cara was diagnosed with delusional disorder. Delusional disorder, traditionally synonymous with paranoia, is a mental illness in which a person has delusions, but with no accompanying prominent hallucinations, thought disorder, mood disorder, or significant flattening of affect.