Agatha Christie became known for tightly plotted murder mysteries, usually featuring one of her signature detectives. The sleuths employ their individual techniques to sniff out the perpetrator before a big reveal at the end. Whether they feature Poirot’s fastidious perfection, Miss Marple’s busybody meddling, or Tommy and Tuppence’s ditsy but darling snooping, Christie’s highly structured stories were (and are) constant bestsellers.