These pages can only be read by you as a player by moving your cursor over their icons in your inventory, and then stored away. They cannot be used in any way ingame as of yet (May 2017).
Their sole purpose is to give you some hints about the background-story of Creativerse. They seem to have been written in a time-based order that can only be guessed. They are not parts of an ongoing story nor coherent information, just snippets that won't fit together clearly.
You might want to read more about these rare findings in the main article Notes.