The yellow fever is raging in Philadelphia in 1793, and 14-year-old Lep, who yearns to be a doctor, accompanies his mentor, Dr. Peale, to the city. . . . The portrayal of Lep is especially noteworthy, as Fleischman uses the character to depict the ideology, science and myth revolving around the practice of medicine in the late 1700s.--ALA Booklist starred review.