What a turn around from the last Dan Brown installment of the Robert Langdon adventures. Back to what Robert does best, scurrying around Europe with references to gorgeous basilicas, churches, mosques, museums, paintings, and sculptures. The twisting story line and deceit of some of the characters was so captivating and drew me in to keep the pages turning. The biologic twist was of particular liking and involvement of the WHO; Brown in simply marvelous with words, iconography, imagery, and holding his audience's attention. Bravo!