Creates a book which triggers other map elements when someone says the key phrase to it or within two squares. Place a Marking Rune on the map square before building. The rune will be removed, and the book will be linked to all other elements on the map marked with the same text. Place a book or scroll, which will become the listening book, on top of the Marking Rune. The text should be in a special format like: @match blah This will cause the book to trigger when "blah" is said. You can optionally also add text for the book to say in response on a separate line below the @match.