Published to tie-in with the new BBC TV adaptation. A man died for a crime he didn’t commit... And the murderer is still among them.

No one felt sorry when Jacko Argyle died in prison. Everyone knew he had bludgeoned his mother to death with a poker from the fire.

But when a doctor turns up at the house two years later with proof of Jacko's innocence, the whole family is horrified. Because it can mean only one thing — that their mother's killer is still among them…