By The Pricking of My Thumbs, Agatha Christie
The Book It may be Tommy and Tuppence's last case. When Tommy's elderly aunt passes away at a nursing home, they inherit a painting from a well known artist. It was given to Tommy's aunt by a lady who had recently arrived. Tuppence had talked with the lady for a bit, and liked her. Since the lady, a Mrs. Lancaster, was whisked away just before Tommy's aunt's death, Tuppence tries to solve where the lady went, why she was whisked away so secretly, and if she wants the painting back. All avenues fails. But Tuppence isn't one to let a mystery go. Especially because she believes something may happen to Mrs. Lancaster. She does the only thing she knows how to do, she hunts down the house in the painting. Once she accomplishes this, she finds she's in the middle of another mystery. But if she unravels it alone, how will Tommy save her if she's in over her head? My Thoughts Actually, I think Tommy and Tuppence may be my favorite Agatha Christie ...
