Subway riders share a lot of things—seats, germs—but a new program is spreading something way better across the TTC: books. 

An initiative called Books On The Transit is now leaving novels on random subway trains, buses, and GO platforms for riders to find, meaning you might stumble upon a Harry Potter book lying around at the Yorkdale GO when you least expect it. 

#BooksOnTheTransit will be leaving specially marked books on #TTC vehicles 📚 starting today. Take one home and use the hashtag to let us know what you’re reading. When you’re finished reading, leave it on another vehicle for fellow commuters to enjoy! 🚇 Ride. Read. Return. pic.twitter.com/DXMaccAed5

— TTC Customer Service (@TTChelps) April 29, 2019

Every day, Books On The Transit's 'book bandits' drop off specially marked copies with stickers on them that say, "Ride, Read, Return." 

Those who chance upon a book can take it home, finish it, and leave it on the TTC or GO for other riders to find. 

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A post shared by @ttcinsta on Apr 29, 2019 at 10:28am PDT

Anyone who doesn't want to leave it up to luck can also follow along on the Books On The Transit Instagram page, where they'll be posting every drop-off in advance. 

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A post shared by #BooksOnTheTransit (@booksonthetransit) on Mar 27, 2018 at 3:35pm PDT

This initiative for local bookworms is the Toronto branch of Books On The Move, the book-sharing community that first started in London and has since spread to places like Australia, Indonesia, and NYC.