Clary Fray believed she was a human, also known as a mundane, who possessed the unique ability to see Shadowhunters, half-angel warriors who protect humans from evil. However, after her mother is kidnapped, Clary discovers that she is a descendant of past Shadowhunters. Seeking to save her mother and the Cup from a Shadowhunter named Valentine, Clary teams up with Jace, Alec, and Isabelle to enter the Downworld.
- The Demon in Clary’s Apartment
- Book: Clary kills the demon with a Sensor.
- Movie: Jace kills the demon instead of Clary.
- Simon’s Kidnapping
- Book: Simon drinks a blue cocktail, turning into a rat and accidently being taken away by a vampire
- Movie: Simon is purposefully kidnapped by the kidnappers to lure Clary into a trap. He is never turned into a rat.
- Portals
- Book: No training is required to use portals.
- Movie: Shadowhunters must train to use the portals or else they will lose their santiy and be lost in limbo.
- Jocelyn’s Pregnancy
- Book: Valentine was unaware of Jocelyn’s pregnancy for years.
- Movie: Jocelyn is seen heavily pregnant in a flashback with Valentine and her first child.
- The Cup
- Book: Valentine successfuly steals the Cup.
- Movie: Clary tricks Valentine with a fake replica and keeps the Cup.
City of Bones by Cassandra Clare and The Mortal Instruments: City of Bones are available to check out from the Mission Viejo Library. City of Bones is also available to download for free from Libby.
Mission Viejo Library Teen Voice 
Mortal Instruments sounds like a good movie. Thanks for the review.
I have seen the movie, but your review makes me want to read the book to get a different perspective. Thanks for the review.