From Book 1:

Lilys life is in mortal peril. Her father is missing and now silver-eyed men stalk her through the shadows. What could they want from her? With her friends Robert, the clockmakers son, and Malkin, her mechanical fox Lily is plunged into a murky and menacing world. Too soon Lily realises that those she holds dear may be the very ones to break her heart… Murder, mayhem and mystery meet in this gripping Victorian adventure.