I like Whitechapel Fiend the most comparing to the previous stories and this is why (spoilery):

- Tessa Grey
- baby Jamie and his spoon
- Simon/Jace/George interaction
- Jack Ripper story turned out to be smth completely different
- Simon’s letter
- Tessa/Jem in the end of the story
- Jace/Tessa
- Alec mystery ( why smth happened to Alec again, I want him to be happy forever and ever)