Amazon reader review:  ”How do I love this book? Let me count the ways. I love its sharp, witty voice. Its brisk pace. Its mordant humor. Its vision of 1880s London, a place of huge energy and just as huge contrast. Its echoes of the penny dreadfuls of the Victorian period, and its marriage of them with a sensibility that is entirely satisfying to a modern reader. Its perfectly matched pair of sleuths, who spar constantly yet share a genuine affection. Its wonderful secondary characters, notably Harriet Fitzgerald and Inspector Pond. Its sardonic homage to Doyle (who makes a cameo appearance) and Holmes (who is modeled, the book posts, on its own detective, Sidney Grice). Its unexpected plot twists and its evolving backstory.”