"By the Pricking of My Thumbs" by Agatha Christie [UNABRIDGED AUDIOBOOK WITH TEXT] 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. Tuppence is sure she has seen the house in it before, a recognition that takes her on a dangerous adventure involving a missing tombstone, diamond smuggling and a horrible discovery of what Mrs. Lancaster was talking about.
This is the final Tommy & Tuppence novel. Tommy and Tuppence Beresford have just become the proud owners of an old house in an English village. Along with the property, they have inherited some worthless bric-a-brac, including a collection of antique books. While rustling through a copy of "The Black Arrow", Tuppence comes upon a series of apparently random underlinings. However, when she writes down the letters, they spell out a very disturbing message: M a r y - J o r d a n - d i d - n o t - d i e - n a t u r a l l y!