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TL;DR: Fifteen-year-old Clary Fray sees three teens commit a murder no one else can see and learns she belongs to a hidden world of Shadowhunters, warriors who protect humans from demons. When her mother vanishes, Clary must find the Mortal Cup before the villain Valentine does, and she uncovers shocking family secrets.
Table of Contents
City of Bones at a Glance
| Author | Cassandra Clare |
| First published | 2007 |
| Type | Young adult urban fantasy |
| Best for | readers who love urban fantasy, hidden worlds and dramatic YA romance |
City of Bones is the first book in Cassandra Clare's The Mortal Instruments series, first published in 2007. It is set in a version of New York full of werewolves, vampires, warlocks and faeries, hidden from ordinary people. Below you will find a part-by-part summary, five key takeaways, ideas worth remembering and a note on who will enjoy it.
Content note: Includes fantasy violence and a dramatic twist involving family.
Main Characters
- Clary Fray: A Brooklyn art student who discovers she has Shadowhunter blood.
- Jace Wayland: A cocky, gifted Shadowhunter who takes Clary into his world.
- Simon Lewis: Clary's loyal best friend, an ordinary human who follows her into danger.
- Valentine Morgenstern: A former Shadowhunter leader who wants to purge the hidden world.
- Magnus Bane: A powerful, flamboyant warlock who has been hiding Clary's memories.
What Happens, Part by Part (Contains Spoilers)
A strange murder
At a New York club called Pandemonium, Clary sees Jace, Alec and Isabelle kill a boy who turns into a demon, though her friend Simon sees nothing. The next day, her mother Jocelyn disappears from their apartment, and Clary is attacked by a demon. Jace brings her to the Institute, where Shadowhunters live and train.
A hidden world
Clary learns that Shadowhunters are part human and fight demons, while Downworlders such as werewolves, vampires and warlocks live alongside them. She discovers her own memories have been blocked since childhood. With Jace and Simon, she seeks the warlock Magnus Bane, who confirms he blocked her memories at her mother's request.
The Mortal Cup
Clary learns that her mother hid the Mortal Cup, a powerful object that can create new Shadowhunters, and that Valentine, an extremist Shadowhunter, wants it. Simon is turned into a rat and is held at a vampire hotel, and the group rescues him. Clary realizes the Cup is hidden inside a tarot card painted by her mother.
Betrayal
Clary's mother's friend Luke is revealed to be a werewolf who has protected her for years. Hodge, the Institute's tutor, betrays them and gives the Cup to Valentine. Clary also learns that Valentine is her father, and that Jocelyn fled from him long ago.
The ending
At Renwick's, Valentine claims that Jace is his son, which would make Jace Clary's brother, a crushing blow because Jace and Clary have fallen for each other. Valentine escapes with the Cup through a portal. Jocelyn is found but remains in a magical coma, and the story is set up for the next book.
5 Key Takeaways
- Family secrets can change who you think you are.
- Loyal friends, like Simon, matter as much as magical powers.
- Prejudice between groups, like Shadowhunters and Downworlders, causes harm.
- Courage often means acting before you feel ready.
- The truth can be painful but freeing.
Ideas Worth Remembering
These are paraphrased, not direct quotes:
- You can choose who you become, whatever your family's past.
- Friendship is a kind of strength.
- Hidden worlds are often closer than they seem.
Who Should Read City of Bones?
Read City of Bones if you love urban fantasy, witty banter and a dramatic love story. It suits readers about 14 and up and starts a long series.
Questions to Think About After Reading
These prompts work for solo reading, a book club or a classroom discussion of City of Bones:
- How does Clary change once she learns about the hidden world?
- What does the novel suggest about prejudice between Shadowhunters and Downworlders?
- How did you feel about the twist at the end?
How to Use This Summary
Use this page as a quick reference before a book club meeting, an exam, or a decision about whether City of Bones is worth your time. The takeaways are written to stand on their own. If a point interests you, go back to the book for the author's full story, characters and style, which no short summary can replace.
A Note on Accuracy and Spoilers
This summary is based on the published text of City of Bones, not on any film, series or stage adaptation, which often change the story. Details are kept at the level of the main events so that nothing is invented. Editions differ slightly in length and wording, so page numbers and small details may vary between copies.
Should You Read the Book?
If the summary caught your interest, read the opening chapters before you decide. A summary tells you what happens, but the voice and pacing are what make a book work or not.
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What to Read Next
- Clockwork Angel by Cassandra Clare: the Victorian prequel series
- Shadow and Bone by Leigh Bardugo: a girl discovers a rare power
- Throne of Glass by Sarah J. Maas: an assassin heroine in a magical world
Related: 15 Books Like City of Bones You’ll Love
Frequently Asked Questions
What is City of Bones about?
A teen discovers she has Shadowhunter blood and fights to find the Mortal Cup and her missing mother.
What is a Shadowhunter?
A part-human warrior who protects people from demons.
Who is Clary's father?
Valentine Morgenstern, the villain.
Is Jace really Clary's brother?
Valentine claims so at the end, but later books reveal more.
What order are the Mortal Instruments books?
City of Bones, City of Ashes, City of Glass, City of Fallen Angels, City of Lost Souls and City of Heavenly Fire.
Is there a movie?
Yes. A 2013 film, and the TV series Shadowhunters.
What age is it for?
It suits readers about 14 and up.
Is City of Bones a romance?
It has a central romance, but it is mainly an urban fantasy adventure.
Is City of Bones worth reading?
It depends on what you want. The book is best for readers who love urban fantasy, hidden worlds and dramatic YA romance. If that describes you, it is likely a good fit. If not, the titles under What to Read Next may suit you better.