Conventional Wisdom

Marcia writes: "Agatha Christie dedicated BY THE PRICKING OF MY THUMBS to the 'many readers . . . who write to me asking: What has happened to Tommy and Tuppence? What are they doing now?' By the time of her last novel, POSTERN OF FATE, Tommy and Tuppence Beresford have three children. Their adopted daughter, Betty, is working in Africa and the twins, Deborah and Derek, are married. At the end of the novel, Deborah makes a brief appearance at the Beresfords with her children. Now, years lat...