Were you paying attention on your commute this morning? Because while you were keeping your head down, avoiding all eye contact and generally wishing you were anywhere but on the Central line you might have missed something really special.

Harry Potter star Emma Watson has been sneaking around the tube network hiding copies of Maya Angelou's novel 'Mom & Me & Mom'.

📚👀 @booksontheunderground @oursharedshelf #Mom&Me&Mom A video posted by Emma Watson (@emmawatson) on Nov 1, 2016 at 2:40pm PDT



The book is Watson's current choice for her online book club Our Shared Shelf, which sees readers from all over the world discuss a new feminist novel every two months. And she's been hiding copies of the book as part of the Books on the Underground project.

I've been hiding copies of Mom & Me & Mom for @booksontheunderground on the tube today! See if you can find one tomorrow! 📚👀 @oursharedshelf A photo posted by Emma Watson (@emmawatson) on Nov 1, 2016 at 2:29pm PDT



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. They have been popping up all over the place.

Another piece of helpful advice, there. #booksontheunderground A photo posted by Books On The Underground (@booksontheunderground) on Nov 1, 2016 at 6:32am PDT

4 million commuters. 100 books. Feeling lucky today Londoners? The hunt begins! #MayaAngelou #OurSharedShelf pic.twitter.com/s72f06T5Pp — The Book Fairies (@BOTUBookFairies) November 2, 2016

Lucky commuters who find a book are encouraged to read it before leaving it on the tube again for someone else to enjoy. In total there are 100 copies of the book somewhere on the Underground.

Better keep your eyes peeled on the way home...

In other news, Emma Watson wore fake teeth in 'Harry Potter and the Philosopher's Stone'

And this magical map shows all the Harry Potter locations in London

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