By the Pricking of My ThumbsA print on demand edition of Christie's masterpiece especially for readers who prefer the old pocket sized 'A format' paperbacks. An old woman in a nursing home speaks of a child buried behind the fireplace When Tommy and Tuppence visited an elderly aunt in her gothic nursing home, they thought nothing of her mistrust of the doctors; after all, Ada was a very difficult old lady. But when Mrs Lockett mentioned a poisoned mushroom stew and Mrs Lancaster