Dance to Your Daddy — Gladys Mitchell

Rosamund Lestrange's behaviour is decidedly strange - but is she really an unhinged wife, or is she an innocent and sane girl at the centre of a conspiracy wrought by her guardian? Dame Beatrice Bradley is called to apply her psychiatric skills to the problem, but when the question of a rich inheritance arises and a body is found, her peerless skills as a detective are more urgently required.