This combination of photos shows cover images for "Lost Children Archive" by Valeria Luiselli, left, and "Midnight in Chernobyl: The Untold Story of the World's Greatest Nuclear Disaster" by Adam Higginbotham, both winners of the Andrew Carnegie Medal, a $5,000 prize presented by the American Library Association. (Knopf, left,/Simon & Schuster via AP)
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