After Lin Xun reached a cooperative intention with the Knowledge god servant, they had an in-depth exchange.
The servant told Lin Xun that the 'Book of Knowledge Illusion' in the real world was a projection and not a physical object.
The servant could use their respective 'Chaos Authorities' to bring the enormous book into the real world, but there was no real necessity for this action.
Whenever Lin Xun needed it, the servant could transfer divine props or some special products of the Omniscient World over to him.
Of course, this step would also require the use of his 'Chaos Ability' to cooperate.
Whenever Lin Xun required it, he could call upon Omniscience and use their 'Chaos Ability' to either project the book or pre-determine the required items into the real world, thus completing their communication.
And the plan to analyze the Book of Salvation only required him to carry on with the game normally.