I read ten percent of this, and gave it up because it was so bad and so trope-ridden. There is nothing new here, nothing unexpected, and it has nothing to offer. Some American writers can do a Victorian London well, but too many cannot, and this one cannot.
I'm tempted to say that the steampunk element is muddled with everything but the kitchen sink, but in fact I think there actually is a kitchen sink. It has fairies and werewolves and on and on, and the steampunk seems to be entirely confined to clockwork servants, so that really isn't any steampunk either, to speak of. In short it was a very confused effort.
The main character has nothing to offer to the discerning reader. The one hope of saving this - the fact that Eliza inherited her father Henry's 'condition' - is entirely predictable, but unfortunately brings nothing, unexpected because instead of making Lizzie truly bad, as was the original Edward Hyde, this author makes her cutesy and gelded. Lizzie Hyde turned out to be a complete disappointment. Eliza is the usual antagonist Victorian female in YA steampunk novels, and that's not a good thing. She predictably has the hots for the snotty, obnoxious, and overbearing main male character, who happens to be a werewolf. I don't read werewolf stories, so for me this was the last nail in the coffin of an already deathbed effort.
I thought this book was lost and muddled, contained far too much of the squalid London and nothing in the way of interesting or engaging characters or steampunk contrivances. The ever-changing voice was a major irritation: Lizzie gets first person, Eliza gets third. I cannot stand first person voice unless it's done exceptionally well, and this was not. In short, it's an all-around fail and I can't recommend it.