Felix walked out of the La building. It was already noon. He stopped by the Little Red Book Company. To his surprise, his sample book of "Magic in the Muggle World" had been completed.

"It's really efficient. I don't have to worry about it at all."

As a serious popular science book, this book is in the same vein as his first two monographs on Muggle research and is expected to become a series.

At least that's what the elegant lady in the purple dress told him.

Felix also specifically asked about things he hadn't paid attention to before, such as how his book went out of Britain and sold all over the world.

From her answer, Felix realized that there are two ways to spread the book around the world. One is to obtain the recommendation of the Ministry of Magic of the country, but this method is not only limited in the number of places, but also because it is an official act, it may be boycotted by some countries; the other way is to become a member of the International Confederation of Wizarding Publishers.

The International Confederation of Wizarding Publishers is a relatively loose international wizarding organization. Its members are top publishers from different countries. They hold assemblies in March and September every year to select some valuable books.

These lucky books will be taken to magic bookstores in different countries for sale.

Felix enjoyed this benefit without knowing it. For this, he expressed his gratitude again.

"Your book is good enough, Mr. Happ. It's a win-win situation for us."

...

Felix returned to school, and many professors came back. Professor McGonagall and Flitwick decorated the auditorium. They were in a very happy mood, and Professor McGonagall even hummed a little tune. The

tall and burly Hagrid walked in carrying two three-meter-long pine trees. Flitwick waved his wand gracefully, let them stand in a corner of the auditorium, and hung colorful paper ribbons on them.

"Felix," Hagrid greeted in a rough voice.

"Hagrid, how is the preparation for class?" Felix asked.

Hagrid said cheerfully, "It went well. I went to the library to look up a lot of information. I looked through all the new books on the market. I dare say that the textbooks I chose are definitely interesting."

"I remember that the textbook for this course has always been "Fantastic Beasts and Where to Find Them"?"

"Ah, that's the textbook for senior grades. I tried something new in my third year... You told me that innovation requires finding a test product, and then promoting it to all students if it succeeds."

"I'm looking forward to it, Hagrid."

Tomorrow is the first day of school, and the professors will gather at a square table for dinner in the evening. Even Professor Trelawney, who was elusive, came in a veil.

She whispered to a house elf, "Help me get some sherry, dear."

The elf stammered, "Okay, okay, ma'am."

Her figure disappeared, and soon she staggered out with a large bottle of wine in her arms, "I'm sorry, I couldn't find a small bottle, so this is the only one."

"Ha!" Trelawney's eyes lit up, "It doesn't matter, this is not bad, very good."

"Would you like some?" She looked at Felix and shook the bottle, and the wine kept shaking.

"No, thank you." Felix politely declined.

Trelawney poured herself a glass of wine, and Professor Burbage beside her also drank a small glass.

Dumbledore appeared for the first time since they met in France. He seemed to be in a good mood. He took the plate of tea-colored cakes handed over by Flitwick with a smile. Felix thought it might be because he had just gotten rid of a boring job.

After dinner, he stopped Felix.

"Wait, Felix. Nick has a few books and asked me to bring them to you." Dumbledore said with a blink of his eyes.

So the two came to the headmaster's office. Dumbledore said in a light tone: "Wait a minute, I put it on the bedside of the bedroom. When you are away, I will read a part every day."

Felix nodded and watched him walk up the spiral staircase and disappear into the second floor of the office.

"That's Dumbledore's bedroom. I wonder what it will look like?" He thought with some curiosity.

The headmaster's office has not changed much. In this large circular room, there were all kinds of funny little noises: the rhythmic breathing of Fawkes the phoenix on the gilded perch, the trivial sound of the silverware rotating on the spindly-legged table, and the snoring of the portraits of the past headmasters on the wall.

Felix stared at the Sorting Hat lying quietly on the partition, hesitating whether to pick it up and study it.

"Hey, Slytherin boy!" said an uncomfortable voice.

Felix turned his head and looked over. It was a portrait on the wall. At the bottom of the portrait, a line of small gold-plated cursive words was written

, "Phineas Nigellus Black, served from 1847 to 1925, graduated from Slytherin House."

Felix asked, "Headmaster Black, are you calling me?"

The portrait in the portrait hummed, "Otherwise, is there anyone else alive in this room?" His goatee was wiggling and his eyebrows were thin and long, looking very unpleasant.

At this moment, he stretched out his hand to grab the photo frame, "Come closer, I have something to tell you." Seeing that Felix stopped where he was, his tone became urgent: "It will be good for you!"

Felix was full of doubts. It wouldn't be his turn to benefit, but he still walked to the portrait of Principal Black.

The snoring in the other portraits disappeared. They either opened their eyes generously to look at them, or half-closed their eyes and watched the interaction between them closely.

But Principal Black didn't say anything, and maybe even if he was dissatisfied, he couldn't do anything. So he said as quietly as possible: "Have you heard of the name Sirius Black?"

"Yes, he is a celebrity now. He escaped from Azkaban three weeks ago." Felix said.

Headmaster Black was choked and said with some shame and anger: "That is the descendant of the noble Black family, my great-grandson!"

"Oh."

"You bad boy, what do you mean!" Headmaster Black yelled in a low voice, but then he said cunningly: "We are all Slytherins, child, I know what you think..."

"Listen, the Black family has a long history, and the old house has a rich collection of books, which is not comparable to those junks in Hogwarts. Do you want it? Do me a favor."

"What is it?"

"Bring him to me, not this me, but another portrait. Remember, No. 12 Grimmauld Place."

Felix was very interested in the Black family's collection of books, but he cautiously probed, "Don't tell me that the old house of one of the 28 pure-blood families has no defenses."

"Listen to me, don't interrupt me, time is limited! You will find it, I believe you can do it, but you need something that is unique to the noble Black family... Oh, Dumbledore! When did you come back?"

Felix turned around suddenly, and Dumbledore had appeared at the handrail on the second floor. He stood there expressionlessly with two books in his arms.

"Long ago, when you admitted that Sirius Black was your great-great-grandson." Dumbledore walked down the steps. He was against the light, so people couldn't see his eyes clearly, but could only hear his powerful voice: "Phineas, we discussed... He committed an unforgivable crime."

The portrait of Headmaster Black shouted loudly: "Dumbledore, he is the last descendant of the Black family!"

But Dumbledore also raised his voice: "... He betrayed his best friend, and he also killed thirteen people, one of whom was also his best friend who had been with him day and night for ten years. Do you know his ending, Phineas? The staff at the scene could only find a finger of Peter and a piece of bloody clothes."

The old man walked to the portrait and said in a cold tone, and every wrinkle on his face contained anger. "And now, he has escaped from prison, fantasizing about helping his old master regain power, and he is willing to kill his godson as a godfather!"

The headmaster's office was silent.