There are many special achievements in "Assassin's Creed: Visions", and the scholar achievement is one of them. To achieve this achievement, you need to bring all 7 lost books to Jahiz. The lost books of the Round City are advancing. It can be collected during the mission to assassinate Hanabiha, in the book puzzle scene.
How to obtain the Scholar of Visions achievement in Assassin's Creed
Scholar
The achievement requirement is to bring all 7 lost books to Jahiz
The lost books in Yuancheng can only be collected when advancing to the mission of assassinating Huabiha, in the book puzzle scene
Only 6 books are displayed in the collection progress of the big map, but there is one hidden in the wilderness area. It is located in the picture below. It is not included in the map full exploration achievement, but it is one of the 7 books required for this achievement.