Road kill - Marianne Macdonald

The middle of the night phone call everyone fears turns out, in this case, to be from Dido's nanny, who has been locked in a closet with the phone by an odd pair of burglars who were looking for something they didn't find. When Phyllis isn't looking after baby Ben she is happily married to a harmless semi-retired invalid. Or is she? Frank is an accountant, and Phyllis knows he spent several years in prison for white-collar crime. But when Frank is found murdered, it becomes very clear that his past was less white-collar than anyone realised, and it's his past which is going to put Dido and her family in danger.