One of the New York Times Book Review's Best Crime Novels of 2017 "Warning: you'll finish this in one sitting." --TheSkimm "Expertly made thriller . . . clever and irresistible." -- The New York Times An electrifying novel about the primal and unyielding bond between a mother and her son, and the lengths she'll go to protect him. The zoo is nearly empty as Joan and her four-year-old son soak up the last few moments of playtime. They are happy, and...