This short article just surfaced on The Independent website about a global campaign launched by Harry Potter fans called #PotterItForward. Apparently, they have started leaving notes in library books and donated books, outlining the impact the book(s) have had on their lives. They then share photos of their notes on social media. The article contains some of the photos that have been shared on Twitter.
It makes for an interesting discussion for mid-level students upwards as to how they would react if they found a note like this in a book they were about to read. Would they find it naff? Or would they be interested in reading what the person had to say? What book would they choose, and what would they write? Is there a book or series that many agree on, and why? After they have written their notes, they could make a collage of photos of their posts.