1968 1st year edition; Dodd, Mead & Company publishers, New York; Book Club Edition; hardbound in black boards with purple lettering along spine; very good condition with unmarked pages; dust jacket very good with very minimal edge wear.
 
"By the pricking of my thumbs, something wicked this way comes" Macbeth
 
goodreads review -
 
While visiting Tommy's Aunt Ada at Sunny Ridge Nursing Home, Tuppence encounters some odd residents including Mrs. Lancaster who mystifies her with talk about "your poor child" and "something behind the fireplace".

When Aunt Ada dies a few weeks later, she leaves Tommy and Tuppence a painting featuring a house, which Tuppence is sure she has seen before. This realization leads her on a dangerous adventure involving a missing tombstone, diamond smuggling and a horrible discovery of what Mrs. Lancaster was talking about.