- Genius Bonus: Some of the Phantom Books are actual literary works.
- In Episode 12, the Phantom Book that was written by a famous but unspecified assassin morphs into the gun that John Wilkes Booth used to assassinate Abraham Lincoln.
- Relationship Voice Actor: Durarara!!'s Shizuo and Celty are Huey and Dalian.
Trivia / Bibliotheca Mystica de Dantalian