Discovering An Old Theory

In all the books that Lin Mu had acquired in the Library Tower he found something that caught his eye. 

"Huh… there's something like this?" Lin Mu found a unique book.

It was a book he had read about in the Immortal World, but now that he was re-reading all the older books, he found that there were actually links to it in the mortal worlds too!

That book was actually from Xiaofan world too, but Lin Mu had never read it before. He had only acquired it at the end, during his conflict with Gu Yao and had been missed among the many items he had.

After all, with the sheer amount of items he had acquired during it all, it would be strange that Lin Mu knew exactly about all that he had.

Especially in the case of a rather mundane book that had basically nor Qi fluctuation and seemed to have been written by a mortal. If not for the content, there was no way Lin Mu would have even discovered it.