A NPC in my adventure (set in Eberron), which I lead as DM, wants to replace some maps in a book with different maps. The person removes the maps by cutting out the pages containing them and somehow inserts the different maps to "repair" the missing pages. How can they do this?
The motivation of the person is to mislead the party without leaving a trace.
Mending does not work, according to this Q&A: Can the Mending cantrip affix any surface to any other surface?