Intruder
If the World's Will was not treating everyone the same way, then the Martial Artists would not have developed to such an extent by now.
After he was done reading the book, Miguel realized that the author only had a name and no surname.
He did not put this to mind anymore as he proceeded to read the other books one by one.
The next book he read was just general knowledge regarding beasts. Although he had already read something similar before, Miguel did not mind reading another one as it could still provide him some insight. Reading one book about something doesn't mean that he already mastered the topic anyways.
With all of his attention being focused on reading, Miguel did not realize that a few hours had already gone by.
As they don't need to eat three times a day, Miguel continued to read without feeling the need to eat.
Unknowingly, it was already deep in the night.