There comes a terrible moment in every mystery reader's life. You turn the last page of the last Agatha Christie novel you haven't read, and you realise there are no more.
Sixty-six detective novels. And you've finished them.
If you've reached that point, first: congratulations, and condolences. Second: you are not without hope. Christie may be the Queen of Crime, but her influence runs through a whole tradition of writers who understood exactly what made her work sing: the fair-play clue, the...
