On her Instagram, the actress posted a video of herself placing a copy of Mom & Me & Mom, by Maya Angelou, on an escalator so a curious reader could pick it up. The club, which kicked off in January with Gloria Steinem's "On The Road", is open to anyone who wants to join, which they can do through Goodreads. It's a memoir that tracks Angelou's relationship with her mother, which transformed from one of pain to one of deep love. "It's not going to stop me from trying to do the right thing and make sure that the right thing happens". Take special care of it and when you are finished please leave it on the tube again for someone else to find.
I bought this copy for you seriously.
The idea is that the books are then returned to the tube for more readers to pick up.
The note, signed by Watson, reads in part: "You are the finder of Our Shared Shelf's bimonthly book choice".
The Harry Potter star was spotted by eagle-eyed fans running around St John's Wood and Oxford Street stations yesterday as part of the Books on the Underground campaign.
Several commuters posted their reactions on social media, with one writing: "I just saw Emma Watson on the tube, I repeat: Hermione Granger on the tube".
Each book also contains a hand written note from the UN Goodwill Ambassador and HeForShe campaigner, who has been doing a stellar job as a Books on the Underground Book Fairy.