Books Like You Should Have Known by Jean Hanff Korelitz
18 Thrillers to Read After You Should Have Known, aka the Book That Inspired The Undoing
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E.G. Scott's thrilling nightmare will keep you up all night. In another novel based on a relationship hidden in the dark, In Case of Emergency revolves around Charlotte, who has somehow winded up as a suspect in the murder of a woman she's never seen or heard of before. Her new beau is conveniently MIA, and it's her word against the cop's...unless she can prove her innocence and find the killer.