- Fan Community Nickname: The fandom has taken for itself the name of the half-angel demon hunters around whom the books revolve, the Shadowhunters.
- Promoted Fanboy: Cassandra Jean was a fan of the books before she became the series' main illustrator.
- Similarly Named Works: City of Glass, the third in the trilogy is presumably not related to Paul Auster's classically surreal postmodern detective novel or the multi-movement jazz composition by Stan Kenton.
- The Wiki Rule: The Shadowhunters' Wiki: Covers both this series and the other books in The Shadowhunter Chronicles.
Trivia / The Mortal Instruments