Who was the Half-Blood Prince?
Harry had often wondered about it at first, but as he became increasingly absorbed in those brilliant notes, he stopped dwelling on the question.
Thanks to those notes, he had become the little Potions Prince whom Professor Slughorn often praised in public.
Why "little"? Because Professor Slughorn called Eli the Potions Prince.
Harry was deeply dissatisfied. Who exactly was the older brother, and who was the younger?
To win back some ground as soon as possible, at least in Potions, Harry studied that mysterious textbook even harder.
As a result, Harry had become increasingly reclusive. Even Ron rarely saw him anymore.
If anyone wanted to find Harry Potter now, he was either in the library or in his dormitory.
If it had been Hermione, this would have been perfectly normal. But because it was Harry, it was astonishing.
During this period, Harry's friends had been devoted to figuring out exactly what was so magical about the textbook he carried around all day.
Ginny was still worried that it might be the same kind of thing as Tom Riddle's diary from their second year.
After what had happened with the Basilisk, Ginny was very worried about Harry.
If not for the fact that being a girl made it inconvenient for her to enter the boys' dormitory, she would have barged in long ago.
Hermione was also very concerned about this. She couldn't stand the thought of someone obtaining a magical notebook and then surpassing her, even if that someone was her best friend.
Perhaps only Eli and Draco were not paying much attention to the matter, because they were plotting something else.
The Dark Lord had assigned Draco the task of assassinating Dumbledore. At the same time, he had instructed Draco to find a way to