Lucius, as per usual was putting his head down and reading the books that the guild library had to offer, it had a great amount of knowledge that Lucius was after, he learned that there are other gravity magic users in the world, at least recorded ones from what Lucius read, so these people might've passed long ago, but he might seek out any possible remaining ones to learn more about what gravity magic had to offer. Lucius had some use and learned knowledge of gravity magic, but he wasn't satisfied at his level of power and wants to build it up even more, hence why he went to the library in the first place.
Something strangely happened earlier... It appeared that a librarian or a high-ranking member of the guild walked by earlier, carrying a bunch of books and he dropped one of them and didn't even realize, Lucius picked it up and tried to give it back to the person, but he was long-gone by the time Lucius went to pick it up. This book was black in color with gold accents, he decided to carry it with him to his table as he studied so if he were to catch that person again, he would give it back. But he was starting to get an urge to read the black book. He just doesn't know if it's something he should read, and doesn't want to get in trouble if it's dangerous or against the rules to read something he shouldn't. Oh well, he wasn't finished with his studies anyway, he kept going through the books he was still reading, and he would see how he felt once he was finished with his current books.
Something strangely happened earlier... It appeared that a librarian or a high-ranking member of the guild walked by earlier, carrying a bunch of books and he dropped one of them and didn't even realize, Lucius picked it up and tried to give it back to the person, but he was long-gone by the time Lucius went to pick it up. This book was black in color with gold accents, he decided to carry it with him to his table as he studied so if he were to catch that person again, he would give it back. But he was starting to get an urge to read the black book. He just doesn't know if it's something he should read, and doesn't want to get in trouble if it's dangerous or against the rules to read something he shouldn't. Oh well, he wasn't finished with his studies anyway, he kept going through the books he was still reading, and he would see how he felt once he was finished with his current books.