Victorian London, vampires, and clockwork creatures...How could I not read this book?! While this easily readable young adult did deliver on all of the above, the whole demon-slayer lore still came off a bit fuzzy until closer towards the end. The story clearly breaks off in the middle of major plotlines which means I will be seeking out the following volume in the future. 
 I feel this would make a lovely little graphic novel like how Soulless was turned into Soulless: The Manga, Vol. 1.