Penguin Classics has launched a nationwide poster campaign that celebrates the individual relationships between readers and the books that they have loved.'Happy Reading' is a series of posters that feature Penguin Classics borrowed from authors, artists, scientists, musicians and book lovers worldwide. There will be over 400 posters across the London Underground, a digital campaign advertised across social media and flyposting in key cities around the UK. The posters include recommendations from Ali Smith, Elif Shafak, David Gentleman and Kate Tempest, among others, but the books themselves are the stars of the campaign.Penguin Classics is geographically and chronologically the largest library of classic literature ever published, originally launched in 1946 with EV Rieu’s translation of The Odyssey. The new poster campaign follows the success of the first ever Penguin Classics pop-up shop, Happy Reading, which was held in London earlier this year from 25-31 March. The bookshop space displayed each of the 1,257 books in the world-renowned list and was a cultural space for sold-out events throughout the week.Readers can share their own Penguin Classics on social media using the hashtag #HappyReading.CreditsDesigner: Tom EtheringtonPhotographer: Lol Keegan