According to Luke  (English, Paperback, Stembridge Gerard)

Now that their children are almost reared, Frank and Norma Reid can congratulate themselves on a job well done - the eldest married and settled in their second favourite city, New York; their first boy in a marvellous job in the National Museum, the younger girl with a truly inspiring (if exhausting) passion for social justice, and the baby - well, he may be young, but he shows every sign of being quite the performer, like his Dad. They could pat each other on the back - thirty-odd years of happy marriage is not to be sneezed at - if it wasn't for a vindictive investigation into Frank's legal career. Suddenly, their lovely family starts to behave very strangely, and the elder son, Luke, is worst of all: when it comes to his father's alleged misdemeanours, he appoints himself judge, jury and executioner. And it looks like he will stop at nothing to achieve his version of justice ...