Quest - Search for the book's elemental marks – Genshin Impact
How to do The book's elemental marks quest. Donna will tell you that the book she borrowed was stolen. Use elemental sight to find purple energy on the ground. Investigate. Then, exit Mondstadt and immediately after the bridge, use the elemental view to see the purple energy. Continue to follow the yellow marked area on the map which will lead you up the hill near a treasure chest. Use elemental sight again to find energy. Once you are done, go to the next yellow area to find the next clue. Now you need to follow the elemental energy. Use the elemental view to see where the energy flows and follow it all the way. You will be led to a secret entrance made by an Abyss Wizard.
