Cover of Clockwork Prince by Cassandra Clare

Clockwork Prince

2,784-word summary 12 min read 502 pages in the book

First published
2011
Publisher
Margaret K. McElderry Books
Pages
502
ISBN
9781416975885
Series
The Infernal Devices (#2)
Reading options
What's inside (8 sections)
  1. Staying at the London Institute in 1878
  2. Will Herondale and the Curse He Believes
  3. Jem Carstairs, Yin Fen, and Quiet Love
  4. Charlotte Branwell Against Benedict Lightwood
  5. Mortmain, the Council, and the Mortal Sword
  6. Woolsey, Nate, the Train, and the Lightwood Fall
  7. Key takeaways
  8. FAQ

I came to Clockwork Prince right after Clockwork Angel because the first book left Tessa Gray in a strange safe place that did not feel safe. This is book 2 in The Infernal Devices, published in 2011 by Margaret K. McElderry Books, and my copy runs 502 pages. It stays in London in 1878, inside the London Institute, with the same small household I had started to care about. Charlotte Branwell still tries to hold the Institute together. Henry Branwell still builds machines that smoke. Will Herondale still jokes when he should speak plainly. Jem Carstairs still plays the violin late at night. Tessa still reads and tries to learn what her power to Change means.

Tessa Gray has no home in New York now. Her aunt Harriet is dead. Her brother Nate Gray has shown himself tied to the enemy. The Dark Sisters are dead, but their master remains. Axel Mortmain, called the Magister, wants Tessa because she can hold an object and take the shape of a dead person, carrying voice and memory. The Institute offers her rooms, training, and a kind of family. She sews with Sophie Collins. She spars with Jessamine Lovelace. She sits with Jem when his hands shake. She argues with Will when he turns cold. She is sixteen and trying to act with care while adults use her as proof in their fights. The plot moves on two tracks. One is private. Will loves Tessa and believes love will kill her. Jem loves Tessa and believes his illness will leave her a widow. The other is public. Charlotte must keep leadership of the Institute against Benedict Lightwood, survive a Council trial with the Mortal Sword, and stop Mortmain and his automatons. Around those tracks circle Woolsey Scott, Nate and his fresh betrayal, and a train full of clockwork monsters.

Staying at the London Institute in 1878

The London Institute in 1878 is not a castle and not a school. It looks from the street like a church that London forgot, with high walls and glamour to turn mundane eyes away. Inside are cold corridors, a large library with green lamps, a training room with sand on the floor, a chapel, an infirmary that smells of herbs, a dining room where arguments happen over soup, and Henry crypt in the cellar where half built sensors tick. Tessa learns the paths quickly. She knows which stair creaks. She knows where Sophie folds linen. She knows where Jem practices violin when sleep will not come.

Daily life steadies her after the Dark Sisters. She takes lessons in Nephilim history, in runes that heal, in demons and wards, in the Accords that bind Shadowhunters and Downworlders. She practices with blades and fails and tries again. Jessamine complains about ruined dresses and stays to correct her grip. Sophie, whose scar marks old cruelty by a mundane master, shows Tessa how to move quietly. Thomas, Agatha, and Cyril keep coal and horses ready. Charlotte writes letters late and checks patrols. Henry forgets meals. Will marks pages for Tessa without saying he does it for her. Jem asks what she is reading and truly listens.

That calm breaks often. Automatons appear where they should not. A metal servant waits in a lady parlor. A clockwork footman stands too still in a hall. Tessa feels watched in shops. Charlotte doubles guards. The Clave sends cold notes asking why the London Institute cannot catch one human industrialist. Tessa offers her help as bait, and Charlotte refuses to spend her. That refusal matters. Tessa spent weeks as a prisoner forced to Change for the Magister. At the Institute she is asked, not ordered.

Small scenes carry weight here. Tessa mending a sleeve while Sophie talks of family. Jem teaching Tessa a song on the roof. Henry showing a sensor that spins and dies, then laughing at himself. Will leaving a book of poetry open to a marked poem and denying it means anything. When danger comes later, I feared for rooms as much as people. Drill leaves bruises. Tessa learns runes cannot be borne by her skin as Shadowhunters bear them. She can Change, she dreams of clockwork hearts, but she is not Nephilim. Jem treats that as fact. Will treats it as reason to keep distance, which Tessa reads as scorn though it is fear.

Will Herondale and the Curse He Believes

Will Herondale is seventeen, dark haired, blue eyed, quick with knives and quicker with insults. In the first book he seemed cruel for sport. In this second book Clare shows the lock on his door. When Will was twelve in Wales, he opened a warlock box and freed a demon. The demon told him every person who loved him would die. His sister Cecily would die. His parents would die. Anyone he loved would die. Will believed it. He ran to London, cut ties, acted reckless so no one would love him, and pushed people away even while clinging to Jem as parabatai.

That secret explains much and excuses too little. Will is kind to Jem in private, brings his medicine, sits through bad nights, then mocks Tessa at breakfast to keep her from looking too close. He reads her favorite books so he can argue about endings. He saves her life and then says something sharp enough to spoil the rescue. Tessa sees flashes of care and cannot trust them. One page I wanted to shake him. The next I wanted to sit with him while he cried.

The curse plot turns on research and shame. Will starts to doubt the demon after Jem presses him and after Tessa refuses his cold manner. He hunts records with Jem and Tessa in the library and in the Silent Brothers archives. He asks Magnus Bane, the warlock with cat eyes, for help. Magnus teases him and tells hard truths cheaply. With Magnus he learns demons lie as easily as they breathe. The demon may have wanted a lonely boy who would never form bonds.

While that search runs, Will and Tessa grow closer. They train together. They argue about books. They hide in a closet during a party to avoid dancers and talk of Wales and New York. They kiss in a moment that feels both wanted and wrong, because Jem loves Tessa too and Will knows it. The kiss is tender and guilty. Tessa pulls back first, not because she feels nothing, but because she feels too much for two people. Clare writes Will pain without letting him off free. He still chooses rudeness when honesty would cost less. Yet he also runs into danger for Jem and carries Tessa through snow. His curse may be false, but his grief is real. Five years of pushing love away cannot be undone in one apology.

Jem Carstairs, Yin Fen, and Quiet Love

James Carstairs, called Jem, is the steady center of the Institute. He is seventeen, thin from illness, with silver hair and silver eyes. He was raised in Shanghai, where his parents drew a demon attention. The demon killed them and tortured Jem with yin fen, a drug made from demon poison. The drug kept him alive after the attack and now kills him by slow degrees. He keeps it in a silver box and measures doses with care. Without it he shakes, coughs blood, and cannot stand. With it he can fight and play, but each dose shortens his time. He thinks he has perhaps two years. Some days less.

Jem loves Tessa openly and without games. He shows her London bridges when fog lifts. He plays violin for her when words fail. He asks about her books and remembers answers. He teaches her to throw knives without mocking misses. He sits with her while she practices Changing to find lost memory, and holds her hand after so she knows she is herself again. Where Will burns hot and cold, Jem stays warm.

His illness shapes every choice. He will not ask Tessa to nurse him only to bury him. He tries to find a cure through the Silent Brothers and through Tessa power. He fails and keeps smiling. Clare does not make Jem a saint. He feels jealous of the Will and Tessa kiss. He feels angry at his weak lungs. He feels tired of being brave. He says so to Will once, in a short fight, because parabatai rarely speak plainly about hurt.

Then Jem proposes to Tessa. He finds her after a hard night, with no music and no crowd, and offers a jade pendant and a simple ask. Marry me. Not from pity. Not to block Will. He knows he is dying. He knows she cares for Will too. He offers what time he has, honesty, music, and a home in each day. Tessa says yes through tears, because she loves him and because his kindness has held her since she arrived. Just two young people promising what they can. Will reaction, when he learns, is grief held tight. He loves Jem as brother and Tessa as more, and he steps back because he thinks his curse makes him poison.

Charlotte Branwell Against Benedict Lightwood

Charlotte Branwell runs the Institute at twenty three, small, brown haired, sharp eyed, married to Henry. She keeps patrol logs, writes clear reports, pays debts, and remembers every servant birthday. The Clave respects her work and doubts her right to lead because she is young and a woman. Benedict Lightwood, father of Gabriel and Gideon Lightwood, uses that doubt like a blade. He is rich, tall, cold, with sons raised to sneer. He tells the Council Charlotte wastes money on Henry failed inventions, shelters a strange girl of unknown breed, and cannot catch Mortmain. He wants her post and her house.

The leadership vote frames the middle of the book. The Consul Wayland sets a trial period. Charlotte has two weeks to find Mortmain or lose the Institute. Benedict smiles through meetings and sharpens knives in letters. Gabriel mocks Will and Jem and sneers at Tessa and Sophie. Gideon watches more and speaks less, and starts to see his father clearly. Charlotte answers with work. She sends Will and Jem to question Downworlders. She sends Henry to finish a sensor that can track automaton energy. She asks Tessa to risk Changing to find Mortmain trail.

Henry loves Charlotte fully and shows it badly by missing dinners to solder wires. His inventions fail loudly. His good heart never fails. In this book he finally builds something that holds, with help from unexpected hands. Their marriage, affectionate and tired and true, stands against the Lightwood cold house where sons fear their father. Benedict plays foul. He spreads rumor that Charlotte hides Mortmain ties. He uses Nate Gray, who claims Institute cruelty, as witness. He pushes for a Council trial with the Mortal Sword, which forces truth from Shadowhunters who hold it. For Tessa, who is neither Shadowhunter nor Downworlder in a clear way, the Sword burns. Charlotte agrees to trial because refusal looks like guilt.

I found these politics slow in places. Pages of letters, votes, and Council speeches stall the hunt for Mortmain. Yet the slowness serves a point. Power in Idris moves by custom and pride, not speed. Charlotte must win by rules written to exclude her.

Mortmain, the Council, and the Mortal Sword

Axel Mortmain, the Magister, rarely shows his face, which makes him worse. He is a human industrialist with factories, ships, and money in banks across London. He does not cast spells. He pays men who do. He builds automatons, clockwork soldiers with dead eyes and demon energy in their chests. Some wear human faces. Some wear metal. All obey. In the first book he used the Pandemonium Club as cover. Now he uses Council pride. While Shadowhunters argue over who leads the Institute, his men drill, ship crates, and cut telegraph wires.

Tessa is his key. Her power to Change lets her wear the dead, and Mortmain believes her blood can wake an army that needs no warlock to run. He had the Dark Sisters train her. He had Nate watch her. Nate Gray, her brother, helps him for money and rank, then begs Tessa to join Mortmain when caught. Tessa loves Nate as family. Nate sees her as stock. He calls her his sister while selling her shape. Clare writes him as weak rather than grand, which makes his betrayal feel closer and uglier.

The Council trial with the Mortal Sword takes up the heart of the book. The Hall is stone and harsh light, with rows of Shadowhunters in black. The Consul holds the Sword, a blade that glows near truth and burns liars. Charlotte speaks plainly about patrols and Mortmain crates traced to Yorkshire. Benedict accuses her of hiding Tessa nature. Will, called to hold the Sword, tells truth about loving Tessa in a way that moves the room, because the Sword will not let him hide. Jem, ill and pale, speaks of Charlotte worth. Tessa, asked to hold it, burns, because she is not Nephilim, and the room gasps at proof she is other.

Mortmain strikes during division. Crates leave London by rail. Men vanish from factories. Downworlders report clockwork footmen asking for Tessa by name. Woolsey Scott, head of the London vampires, brings warning wrapped in insult. He lounges in Charlotte parlor, drinks tea he cannot taste, flirts with everyone, and tells plain truth. Mortmain is building. The Council is blind. Charlotte accepts Downworlder help others would refuse, which Benedict calls treason and I call sense.

Woolsey, Nate, the Train, and the Lightwood Fall

Woolsey Scott steals every scene he enters. He leads London vampires, keeps rooms of silk and silver, owns a laugh that fills halls, and pretends carelessness while noting all. He teases Will about hair, Jem about manners, Tessa about books, and Charlotte about marrying beneath her, though he respects her more than most Shadowhunters do. When Mortmain threatens Downworlders too, Woolsey offers fighters for a price that is mostly pride. He wants thanks and a good fight. His alliance shows Accords in practice, not paper. Vampires guard an Institute door.

Nate return sharpens hate. Tessa meets him in a cell and later in Mortmain rooms, hoping family feeling remains. Nate mocks her books and her love for two boys. He tells her Mortmain will keep her safe as wife and weapon. He wears fine coats paid by Mortmain coin. He fears Mortmain but loves money more. Tessa offers him escape. He refuses. When automatons march, Nate stands with them, not with her. Clare lets Tessa grieve a brother who still breathes, which is a neat and cruel grief.

The train automatons attack closes the book with noise and fire. Charlotte traces Mortmain crates to a rail line north. Will, Jem, Tessa, Henry, and allies board to stop shipment of parts. Fog fills the platform. Then metal hands break through carriage walls. Automatons pour in, tall and jointed, with furnace eyes. Henry device screams. Will blades flash. Jem fights though cough tears blood from his lips. Tessa Changes to draw memory from a dead engineer, then fights with a blade she barely knows. Woolsey fighters tear roofs open. Steam burns. A boiler blows. I read those pages fast, which says Clare earned the rush after slow Council chapters.

The Lightwood fall lands after battle, quieter and worse. Benedict Lightwood, exposed as tied to Mortmain through money and through demon pox he caught from dealings with demons, breaks in his own hall. The pox twists him. Gideon and Gabriel watch their father turn from proud man to scaled thing that snarls. The sons choose the Institute over blood, Gideon first, Gabriel after a hard hour. The Council sees Charlotte stood true while Benedict rotted. Her leadership holds. The vote fails. Criticism must be plain here. The love triangle stalls the middle. Will and Tessa kiss, then part for honor. Jem and Tessa promise, then wait for health. Tessa weeps between them while Mortmain ships death by rail. One less dance and room for more hunt would help. Council politics also drag. Trial speeches repeat points. I skimmed two passages that read like minutes. Still the strengths outweigh drag for me. Charlotte win feels earned. Woolsey Scott adds bite without stealing grief. Nate betrayal cuts. Will curse reveal reframes his cruelty without erasing it. Jem proposal and his illness give the book a sad light no battle can match. I closed the 502 pages knowing middle books should deepen bonds and raise costs, and this one does, with Mortmain still free and clockwork hearts still ticking in the dark.

FAQ

Do I need to read Clockwork Angel before Clockwork Prince?

Yes. Clockwork Prince is book 2 in The Infernal Devices from 2011 and continues Tessa Gray at the London Institute. Reading Clockwork Angel first gives you Nate, the Magister reveal, and the Will and Jem bond.

Who is the Magister in Clockwork Prince?

Axel Mortmain, the human industrialist called the Magister. He builds clockwork automatons, funds his work through factories, and wants Tessa for her power to Change.

Does Clockwork Prince end the love triangle?

Yes. Tessa cares for both Will Herondale and Jem Carstairs, and this middle book holds both a kiss with Will and a proposal from Jem without settling the choice.