An Unwanted Guest de Shari Lapena
She wanders along the shelves, dragging her index along the surface. Something seems to catch her eye, and she pulls a volume from its place. 'Oh - I've heard about this one,' she says. 'I've been meaning to read it.'
David reads the title - The Suspicions of Mr Whicher, or The Murder at Road Hill House.
'I love a good murder mystery, don't you?' she says.