By the Pricking of My Thumbs

Ladies disappearing from homes of rest, sinister empty houses, hints of gang-leaders mixed with black magic – mystery at the usual high Christie level.

Tommy and Tuppence Beresford visit an unpleasant aunt in a home. From this typically unlikely beginning, murder and all kinds of excitement develop, to the point when Mrs Beresford meets the mass killer in the secret room of the house.