All theory, no practical

Days passed as Havien practically lived inside the library. The guildmaster had strictly informed everyone at the guild to not disturb Havien. Even the guildmaster himself tried to avoid him, to not mistakenly offend him by disturbing him. He feared the consequences of such an action.

Havien, on the other hand, was totally engrossed in reading the countless books inside the library. Since his capabilities allowed him, he started speed-reading the books, which is basically flipping the whole book, memorizing the contents, and understanding the book while keeping it on the back of his mind as he picked up the next book.

This way, he only needed to just flip through all the books quickly, which given Havien's endless stamina, was a task possible to be completed within 2 days.

And so he did. The generations of knowledge of hundreds of thousands of alchemists are all now inside Havien's mind within just 2 days.