
The pleasure of guessing wrong
The closed-circle Agatha Christieian detective story has rather fallen out of fashion in favour of the ‘crime novel’, the essential difference being that while every detective story is a crime novel the reverse is not necessarily the case. As the doyenne of the detective story P. D. James rarely strays far from home and The Lighthouse represents the form at its purest. First, we need the right, closed setting. It used to be a remote country house which a snowfall has cut off from the outside world, isolating the dozen people suspected of murdering the colonel. P. D. James has gone one better and invented her own island, Combe, off