Queen Victoria's court knows Charlotte Sycamore as the mild-mannered sixteen-year-old daughter of Her Majesty's royal surgeon. Yet Charlotte has a penchant for inventing new gadgets, and most nights she sneaks out to sword fight with her best friends, Peter and Jillian. When the three are mauled by what look like rabid dogs, Charlotte is forced to hide both her friends and her own injury. As her symptoms worsen and people are murdered across London, she embarks on a race against time to find the antidote and ultimately save the queen's life. Full of action, a luxe royal court, engineered beasts, and a good dose of humor, this steampunk novel is a masterful blend of science fiction, fantasy, and alternative history.