N or M?

(Quinta colonna) di Agatha Christie Tommy e Tuppence ← Tommy e Tuppence: in due si indaga meglio (Partners in Crime) By the Pricking of My Thumbs → Voto: 8 e 1/2/10 Tommy Beresford removed his overcoat in the hall of the flat. He hung it up with some care, taking time over it. His hat…