A delightful combination of race-against-the-clock medical mystery and outwit-the-bad-guys adventure. "Publishers Weekly, "Starred Eel has troubles of his own: As an orphan and a mudlark, he spends his days in the filthy River Thames, searching for bits of things to sell. He s being hunted by Fisheye Bill Tyler, and a nastier man never walked the streets of London. And he s got a secret that costs him four precious shillings a week to keep safe. But even for Eel, things aren t so bad until that fateful August day in 1854 the day the deadly cholera ( blue death ) comes to Broad Street. Everyone believes that cholera is spread through poisonous air. But one man, Dr. John Snow, has a different theory. As the epidemic surges, it s up to Eel and his best friend, Florrie, to gather evidence to prove Dr. Snow s theory before the entire neighborhood is wiped out. Hopkinson illuminates a pivotal chapter in the history of public health. . . . Accessible . . . and entertaining. "School Library Journal, "Starred For [readers] who love suspense, drama, and mystery. "TIME for Kids" "From the Hardcover edition.""