Keep an eye out tonight for copies of The Sin Eater's Daughter by Melinda Salisbury! We have hidden copies on trains, benches and escalators ... #booksontheunderground

Who will snap up this copy of The Bone Season, hiding RIGHT NOW at Angel tube station? #booksontheunderground (at Angel tube station)

With a beautiful cover like this, #INK stands out from the crowd... will YOU spot a copy on your journey around #London today? @scholastic_uk @alicecrumbs #booklove #lovebooks #bookrecommendation #thebookfairies #booksoninstagram #booksontheunderground #booksinlondon #londonbooks #beautifulbook #bookcover #bookcoverdesign #londonunderground @transportforlondon @britishtransportpolice

Happy Valentine's Day from Books on the Underground! Here are the book fairies' favourite romantic reads... but what are YOURS? Melanie: Far from the Madding Crowd, Thomas Hardy Cordelia: Pride and Prejudice, Jane Austen Lauren: Wuthering Heights, Emily Bronte #valentinesday #valentine #valentines #romantic #romanticbook #romancenovel #favouritebook #romance #prideandprejudice #janeausten #thomashardy #emilybronte #wutheringheights #farfromthemaddingcrowd #bookfairies @bookfairiesworldwide #thebookfairies #bookrecommendation #lovebooks #booklove

Thanks to @avrilgrieves for donning her Book Fairy wings today in London - look at all the goodies she left behind! Who found one? #ibelieveinbookfairies #booksontheunderground @bookfairiesworldwide #books #bookfairies #thebookfairies #sloanesquare #freebooks #booksforfree #bookstagram #booksoninstagram

I love when a plan starts coming together. @bookfairiesworldwide launching in March..

Tried to give them a day off, but the Book Fairies are on autopilot! Sharing invisible books around the London Underground today... (we are super weird) #nobooksontheunderground

Look what @geenie093 found on her journey around London this morning! A suspense thriller set in Japan, it's called #BlueLightYokohama! The Book Fairies hid 30 copies today... will YOU find one? #booksontheunderground #booksoninstagram #japan #tokyo #thriller #books #bookcover (at London, United Kingdom)

We love hiding books in the evening.... today's book is #BlueLightYokohama by Nicolas Obregon, a thriller set in Tokyo... currently travelling the central line! @avon_books #booksontheunderground #ibelieveinbookfairies #tokyo #japan #thriller #books #LondonUnderground #london @transportforlondon (at Holborn)

We have a dark thriller travelling the London Underground today - with these gorgeous notes from the author tucked inside! This is a pic from someone who tweeted after finding a copy at Oxford Circus! 🚈🎪 @avon_books #helenfields #booksontheunderground @transportforlondon #perfectremains #bookfairies #bookfairy

Well done to @kyafear, who found one of our #booksaboutChina to celebrate the #ChineseNewYear over the weekend! Happy Year of the Rooster & enjoy the book! We look forward to seeing it travelling the tube again soon 🐓📚👍 #booksontheunderground #booksoninstagram #china #chinesebooks #chineseliterature #findabook #snuggling

We love seeing new books enter the wild, and today @mylittlejaguar used her new Books on the Underground stickers! She hid her last read of 2016, and her first read of 2017 at Vauxhall - were you lucky enough to find them? Do you believe in BOOK FAIRIES? 💫📚 #ibelieveinbookfairies #books #booksontheunderground #booksoninstagram #hiddenbooks #bookdrop #reading #lovebooks #booklove #vauxhall #london #LondonUnderground

Whoop whoop! It's the sound of the POLICE! Tonight they do seem to be a little quieter though, as they tuck into the #t2trainspotting books we are hiding around the underground... The film is out TONIGHT!! Look out for these beautiful film versions of this classic by #ervinewelsh... @sonypicturesuk @sonypictures #trainspotting #booksoninstagram #booksontheunderground #bookfairies #london #londonunderground #bookhunt #findabook #books #eveningbookdrop #theunderground

We are excited today to bring you a book from an independent author - look out for copies of DARKNESS by Victoria Sadler hiding on the #London Underground! #londoneye #LondonUnderground #underground #darkness @victoriajsadler #indieauthor #independentauthor #booksoninstagram #booksontheunderground #books #author

As today's book is #RadioBoy, we thought it best to get some help from a very little Book Fairy, who has hidden his copy at Manor House tube station... @harpercollinsch #booksontheunderground #booksoninstagram #bookfairies #bookfairy #manorhouse