Chapter Summaries

Brook and Hermione rushed to catch the Hogwarts Express after Brook forgot that the Space Gate was still upgrading. They joined Harry, Ginny, Neville, and Luna aboard, where Luna repeated a rumor that Brook was Dumbledore’s illegitimate son and Harry revealed his mixed feelings about Ron becoming a prefect.

• Brook realized he had forgotten the Space Gate was unavailable, forcing Hermione and Mr. Granger to rush to the station by car.
• Hermione and Brook reached Platform Nine and Three-Quarters with three minutes to spare and boarded the departing Hogwarts Express.
• Hermione and Brook found Harry, Ginny, Neville, and Luna in the last carriage, where Luna claimed Brook was Dumbledore’s illegitimate son.
• Ginny explained that Ron and Lavender had been chosen as prefects and were attending a meeting, while Brook and Hermione had not been selected.
• Brook teased Harry about feeling jealous that Ron might get ahead of him, and Harry blushed because the remark was true.

Harry, Hermione, and their friends joked on the Hogwarts Express while Hermione read a ridiculous Ancient Runes article in The Quibbler. Neville demonstrated his Mimbulus Mimbletonia, and Ron returned with Draco, admitting that Lavender had been too enthusiastic for him to handle.

• Luna shared The Quibbler, and Hermione read Xenophilius Lovegood’s article claiming Ancient Runes were Troll graffiti.
• Brook joked about eating Goblins and tricked Neville into thinking he would eat him, making the compartment laugh.
• Neville showed off his Mimbulus Mimbletonia, accidentally making it spray foul-smelling fluid before Brook contained it and Hermione cleaned it up.
• Ron and Draco returned without Lavender, and Ron said she had been too enthusiastic while Ginny teased him for showing off about her all summer.

Brook and his friends attended the Hogwarts start-of-term feast, where Dolores Umbridge appeared as the likely new Defense Against the Dark Arts professor. Dumbledore and the other professors seemed troubled, but Brook reassured Harry, Hermione, and Ron that Hagrid was safe and left them wondering what had happened to Dumbledore.

• Brook advised Ron to make his own decision about his relationships, and Ron invited Lavender to sit with him at the feast.
• Harry, Ron, and Hermione recognized Dolores Umbridge at the staff table and learned she had replaced Percy as the Ministry's choice to teach Defense Against the Dark Arts.
• Professor McGonagall led the first-years through the Sorting Ceremony, and Dumbledore welcomed the students before beginning the feast.
• Hermione noticed that Dumbledore looked exhausted, while Harry worried that Hagrid was in danger.
• Brook said his spatial mark showed Hagrid was alive and explained that Fudge had sent Umbridge to address Hogwarts' teaching, especially Defense Against the Dark Arts.
• Brook implied that only a few people could have hurt Dumbledore, then urged his friends to focus on the feast.

At the start of term, Brook suggested that Hogwarts was Dumbledore’s prison and hinted that the Pious had once been meant to have two leaders, leaving Hermione eager to hear the explanation. The next morning, Brook chose his N.E.W.T. subjects and began Ancient Runes, where Professor Babbling gave him research materials she had obtained in Northern Europe.

• Dumbledore announced Professor Grubbly-Plank’s return and welcomed Professor Umbridge as the new Dark Arts teacher, while Hermione worried that the Ministry planned to interfere with Hogwarts.
• Brook told Hermione, Ron, and Harry that Hogwarts was Dumbledore’s prison, then hinted privately to Hermione that the Pious had originally been supposed to have two leaders.
• Hermione stayed awake wondering what Brook meant, and he promised to explain the next day.
• Brook declined to take Dark Arts for his N.E.W.T. classes, while Hermione chose Charms, Dark Arts, Transfiguration, Herbology, Care of Magical Creatures, Ancient Runes, and Potions.
• Professor Babbling welcomed Brook to Ancient Runes and gave him parchment containing materials she had borrowed from Pure-blood families during her Northern European trip.

Brook found an Oracle Bone Script fragment linked to the Brinshill Family and considered whether they could help with the Bersted Family’s curse. After agreeing to support Angelina’s Quidditch team if needed, he heard Hermione complain about Umbridge’s lessons and prepared for a class on human Transfiguration.

• Brook recognized Great Xia’s Oracle Bone Script in a fragment Professor Babbling had copied from the Brinshill Family and wondered whether the family could help him investigate the Bersted Family’s curse.
• Angelina told Brook she had become Gryffindor’s Quidditch captain and asked him to attend Keeper tryouts, then play in the first match if the team needed him; Brook agreed.
• Hermione gave Brook lunch and complained that Umbridge had made her class read a textbook without teaching any practical defensive spells.
• Brook teased Hermione about revision and said he would prepare a surprise for Umbridge, while Hermione cautioned him not to go too far.
• Professor McGonagall began a lesson on human Transfiguration and asked the class to explain how it differed from being an Animagus; Hermione raised her hand.

In advanced Transfiguration, Brook demonstrated effortless transformations and gave Hermione cat ears and a tail, turning their lesson into a chaotic success. The chapter then moved to advanced Potions, where Snape introduced the Draught of Living Death with only a few cryptic pointers.

• Hermione explained the differences between Animagus transformations and temporary Human Transfiguration, and Professor McGonagall warned the class about the dangers of failure.
• Professor McGonagall paired the students to practice changing their partners’ noses, and Brook transformed his nose into a pig snout for Hermione.
• Brook gave Hermione white cat ears and a fluffy tail, then amazed the class by changing his hand into a wolf claw and his whole body into a sofa.
• The students’ practice descended into comic transformations, and Hermione changed Brook’s hands into pig trotters instead of giving him a pig’s head.
• Snape began the advanced Potions lesson by displaying a sparse set of pointers for brewing the Draught of Living Death.

Snape challenged his advanced Potions students to improve the Draught of Living Death, rewarding those who could explain their experiments. Brook used unicorn blood to enhance his potion, then traded the remaining vial to Snape for homework exemptions and future potions.

• Snape told the students to innovate while brewing and awarded Montague points for a reasoned but historically outdated substitution.
• Hermione improved her potion with peppermint and earned Gryffindor five points after explaining her reasoning.
• Snape urged Brook to try something new, and Brook defended his choice to use unicorn blood in the potion.
• Snape offered to exempt Brook and Hermione from Potions homework and provide them with potions in exchange for Brook's remaining unicorn blood.
• Snape kept Brook's finished potion and dismissed the class after telling the students to submit their brews.

Brook and Hermione attended lessons on advanced Charms and magical plant cultivation before Professor Grubbly-Plank introduced the class to a unicorn. Afterward, Hermione remembered Brook’s promise to tell her about Dumbledore and Grindelwald and demanded he do it immediately.

• Brook found that advanced Charms spells came easily to him, while the class’s attempts to create stable hybrid plants failed.
• Professor Sprout showed the students a glowing, rapidly reproducing vine she had bred from Devil’s Snare roots and fluorescent vines.
• Professor Grubbly-Plank took Brook, Hermione, and the students to see a unicorn, and the girls eagerly approached and fed it.
• Hermione realized she had forgotten to ask where Hagrid had gone, and Brook suggested that Dumbledore might know.
• Hermione reminded Brook that he had promised three days earlier to tell her about Dumbledore and Grindelwald, and she insisted he tell her at once.

Harry returned from Umbridge’s detention with a bleeding message carved into his hand, but refused to report her. Brook agreed to respect Harry’s choice while making clear that he would not let Umbridge harm one of his own, and Ron later vowed to retaliate against her office.

• Hermione and Brook discussed Dumbledore and Grindelwald’s relationship and Dumbledore’s past at Hogwarts.
• Harry came back from detention hiding his injured right hand, and Brook and Hermione discovered Umbridge had carved writing into it.
• Harry refused Hermione’s suggestion to tell Professor McGonagall and revealed that Umbridge had made him write, “Do not believe rumors, do not spread rumors.”
• Harry explained that Umbridge punished him after he questioned her teaching and said Voldemort would return, then insisted he would tell no one about the injury.
• Brook told Hermione he would not stop Harry’s choice but would deal with Umbridge bullying him, while Ron later vowed to blow up Umbridge’s office with Dungbombs.

Angelina held Gryffindor’s Keeper trials, and Ron made the team after catching three shots out of five. After Harry finished detention, Hermione healed the wound Umbridge had inflicted, and Harry asked Brook, Hermione, and Ron to keep something secret.

• Angelina held Keeper trials, and Ron qualified by catching three of his five shots.
• Angelina chose Ron as Gryffindor’s new Keeper, while Brook offered to fill in if needed and asked her to give Ron a chance to improve.
• Harry returned to the common room after his detention ended, and Hermione healed the wound on his hand with Essence of Dittany.
• Brook warned that they should wait before taking revenge on Umbridge, and Harry hugged Brook, Hermione, and Ron in gratitude.
• Harry asked them to keep a secret, and Ron promised even as Harry and Hermione doubted his discretion.

Harry kept Umbridge’s attack on him from Draco and persuaded Snape to reschedule his missed Potions lesson so he could attend Quidditch practice. At breakfast, Hermione discovered that Umbridge had been appointed First High Inquisitor, raising concerns that Fudge was gaining power over Hogwarts and might target Dumbledore.

• Harry asked Ron and Brook to keep Draco from learning that Umbridge had punished him, and Hermione urged Harry to stop provoking Umbridge.
• Harry asked Snape to move his make-up lesson so he could attend Quidditch practice, and Snape agreed in exchange for a full Sunday of lessons.
• Harry attended his first Quidditch practice of the term, then spent Sunday in Snape’s office, where Snape let him work on other subjects and offered occasional help.
• Hermione read the newspaper and told Harry and Ron that Umbridge had been appointed First High Inquisitor under Educational Decree Number Twenty-Three.
• Brook explained that Fudge’s decrees showed his growing influence in the Wizengamot, and the group worried that he might try to remove Dumbledore.

Brook and Hermione watched Umbridge inspect Hogwarts professors, while Brook explained how Trelawney could have protected herself by predicting Umbridge’s success. Harry warned Trelawney, but she experienced a frightening vision that left her convulsing.

• Hermione worried that Umbridge’s inspections could cost Hogwarts professors their jobs, while Brook hoped to see Umbridge clash with Snape.
• George and Fred told Brook and Hermione that Umbridge had inspected Flitwick’s Charms class without provoking a confrontation.
• Harry and Ron recounted Umbridge’s inspection of Trelawney’s Divination class, and Brook suggested Trelawney could have predicted Umbridge’s promotion to protect herself.
• Harry visited Trelawney the next morning and warned her about Brook’s idea, but she insisted prophecies could not be changed.
• Trelawney suddenly delivered a vision about the Dark Lord, his beloved, and the marked boy before collapsing in violent convulsions.

Harry heard Trelawney make a prophecy about the Dark Lord and a marked boy, then told Ron, Hermione, and Brook about it. The group suspected the marked boy was Harry and decided Dumbledore might explain how fate between Harry and Voldemort had changed.

• Harry caught Trelawney as she collapsed, sent for help, and watched Madam Pomfrey treat her soul damage.
• Harry told McGonagall what had happened but kept the prophecy to himself, then spent the morning distracted by it.
• Harry told Ron, Hermione, and Brook the prophecy, including its reference to the Dark Lord as “her.”
• Hermione reasoned that the marked boy was likely Harry and suggested he ask Dumbledore about the altered fate between him and Voldemort.

Harry and his friends speculated about the prophecy, while Trelawney recovered and used a prediction to stop Umbridge from dismissing her. Brook completed the Rift Door skill and, after moving many of his treasures into a suitcase, opened a portal to an unknown world.

• Brook reassured Harry about the prophecy, and he, Harry, Ron, and Hermione jokingly guessed what the prophecy might mean.
• Harry visited the unconscious Trelawney, who later woke with white hair and an eye changed, but could not remember her prophecy.
• Umbridge repeatedly pressured Trelawney to divine for her, and Trelawney predicted Umbridge would be promoted, keeping Umbridge away from her class.
• Brook gained the Rift Door skill and spent more than half a month moving treasures from the Shanhe Sheji Map into his expanded suitcase.
• Brook went alone to an uninhabited island and used the Rift Door, draining his magic as a huge, rune-covered portal opened.

Brook entered a new world and arrived in an orange grove, where he met Nami and learned she was under pressure from the Arlong Pirates. After Nami brought him home, Nojiko decided to help him despite the cost, leaving Nami worried about the money she needed to save.

• Brook crossed the Rift Door, confirmed his magic and belongings still worked, and found himself in an orange grove.
• Nami caught Brook eating an orange and demanded five hundred thousand Beli for the damaged trees, but he offered to work off the debt instead.
• Nami urged Brook to leave before the Arlong Pirates arrived to collect payment, but he feigned hunger and persuaded her to take him home.
• Nojiko welcomed Brook and served him bread, while Nami grew suspicious that he knew her sister's name.
• Nojiko told Nami she would use her savings to cover Brook's expenses, and Nami lamented that the cost would delay her plan to save one hundred million Beli.

Brook offered to help Nami and Nojiko get rid of the Arlong Pirates, then went with Nami to Arlong Park to confront them. After making Nami invisible with a Disillusionment Charm, he charged the gate and wounded an octopus fish-man, beginning his test of strength in the One Piece world.

• Brook offered to grant Nami and Nojiko a request and said he could defeat the Arlong Pirates.
• Nami agreed to take Brook to Arlong Park the next morning.
• Brook made Nami invisible with a Disillusionment Charm and told her to stay back.
• Brook charged Arlong Park’s gate with a saber and taunted the three fish-man guards.
• Brook blocked the octopus fish-man’s attack, then cut him open with a saber strike.

Brook defeated the fish-men guarding Arlong Park with his sword and magic while Nami watched in awe. After Kuroobi and Hachi fell, Brook headed into the park to face Arlong.

• Brook killed the shark fish-man and froze the fleeing catfish fish-man before finishing him off.
• Kuroobi and Hachi led a group of fish-men out of Arlong Park to confront Brook.
• Brook summoned a Flame Giant that overwhelmed Hachi and burned his tentacles.
• Brook used Space Gates to redirect Kuroobi and his lackeys' attacks, then killed them.
• Brook's Flame Giant struck down Hachi, and Nami emerged from hiding to praise Brook.
• Brook told Nami to stay hidden and walked toward Arlong Park to confront Arlong.

Brook confronted Arlong in the plaza and used his Space Gate to make Arlong’s attacks kill his own men, then trapped the fish-men inside a ring of flames. After Arlong slaughtered his remaining subordinates trying to break Brook’s defenses, the two began a direct fight that left Brook adapting to Arlong’s strength and combat style.

• Brook entered Arlong’s plaza and provoked Arlong, who attacked him but repeatedly hit his own underlings through the Space Gate.
• Arlong tried to use the villagers as leverage, but Brook sealed the plaza inside a wall of flames that incinerated a fish-man who approached it.
• Arlong took up Kiribachi and relentlessly attacked Brook’s Space Gate, killing fish-men who got in his way and forcing Brook to maintain his defenses.
• Brook dismissed the Space Gate and clashed head-on with Arlong, whose strength initially drove him back despite his enhancement spells.
• Brook gradually adapted to Arlong’s attacks and began landing blows, though they left only faint marks on Arlong’s tough skin.

Brook killed Arlong and defeated the remaining fish-men, ending the Arlong Pirates’ rule over Cocoyasi Village. He and Nami collected the treasure, and Brook carried her back to the village, where Nami asked him to stop at the entrance.

• Brook used Space Gates to turn Arlong’s Shark Double Strike against him, then killed him with Avada Kedavra.
• Nami hugged Brook and collected her nautical charts, while Brook agreed to take the Arlong Pirates’ treasure.
• Kuroobi, Chew, and more than twenty fish-men arrived, but Brook killed them with the Killing Curse and stored their Beli in his Space Ring.
• Brook let Nami take as much treasure as she could carry, then carried her and her bundle back to Cocoyasi Village when she collapsed.
• Nami asked Brook to stop at the village entrance, and he waited beneath a nearby tree.

After Brook defeated the Arlong Pirates, Cocoyasi Village celebrated its freedom, and Nami gave the villagers the treasure she had collected. Nojiko asked Brook to help Nami pursue her dream at sea, and a system mission prompted him to recruit Nami as his navigator.

• Nami announced Arlong's defeat, and A Jian and the villagers celebrated their freedom and thanked Brook.
• The villagers held a feast for Brook, while Nami distributed her treasure among them.
• Nami told Brook she did not want to leave Cocoyasi Village after he said he wanted to see the sea.
• Nojiko asked Brook to take Nami with him so she could pursue her dream of becoming a navigator.
• The system activated a mission for Brook to recruit Nami, and Brook agreed to talk to her first.