Anthony Gilbert 
Lift up the Lid [EPUB ebook] 

A rich, curmudgeonly old husband, a beautiful young wife, a mysterious voice from the past — and murder… Classic crime from one of the greats of the Detection Club When murder hits the sleepy town of Hinton St Luke tongues start wagging. It’s what you might call a cosy domestic murder: a beautiful young wife; her much-older husband dying at just the right moment; a jealous nurse; a mysterious voice from the past and a set of anonymous letters. But which one will lead directly to the killer’s front door?