The Circus of the Dead: Book 12

Juliette never wants to see Samuel again. In fact, she'd prefer it if he stayed on his side of the island and she on hers, but when a good friend becomes a monster's latest victim, she has to turn to him. Things between them are icy and cold, but she manages to keep things civil. However, as the clues in the case reveal the true monster, Juliette isn't sure she'll ever be able to trust anyone again.