1971’s Sleep and His Brother is the fourth volume in Peter Dickinson’s series of James Pibble mysteries.
Sacked from the police for reasons unexplained, James Pibble is spending too much time at home, at least in the view of his wife. She decides to give him a reason to leave the house. Having overheard a conversation that hints of unspecified criminality, she orchestrates a meeting between McNair House’s Mrs. Dixon-Jones and Pibble.
The meeting begins oddly. On arriving at McNair, Pibble is greeted by two enigmatic dumpling-like children.