When he's 13, Mr. Socrates presses him into service on behalf of the Permanent Association, a secret group dedicated to protecting Great Britain, and the teen is plunged headfirst into a race to prevent the government's destruction. Modo, an innocent who is often shocked by the vulgarities of street life, is paired with fellow agent Octavia Milkweed, a rescued urchin whose street smarts complement his immense physical talents. She is at once a partner, a foil, and a possible love interest. The protagonists are likable, the villains are chilling, and the story is action packed. Forays into the raw effluence of London's sewer system provide just enough "ick" factor. And, Slade gets the Victorian setting just right.