I'm playing the second mission of the Outcast's Path. Currently, I am in the labyrinth. I've searched it completely and only found 4 chronicle books, but the quest didn't complete. As I understand it, there are 5 books in total. Here is a screenshot. The location of this book is shown by a marker on the mini-map. It seems to me that the esteemed author forgot to script this book.

And if this bug isn't fixed, please tell me what happens if you find all the books. I'm just curious.