Inspector Maigret receives a series of letters warning of a murder that is going to take place. The letters do not reveal who will die, when it will happen or who will do it. Maigret must trace the letters back to their source before it is too late.

Penguin is publishing the entire series of Maigret novels in new translations.

'His artistry is supreme' John Banville

'One of the greatest writers of the twentieth century . . . Simenon was unequalled at making us look inside, though the ability was masked by his brilliance at absorbing us obsessively in his stories' Guardian