OKNOTOK 1997 2017 was the first Radiohead compilation released after their back catalogue was transferred from EMI to XL Recordings in 2016. Previous compilations were not remastered, contained no new material and were issued without Radiohead's involvement. OKNOTOK comprises remastered versions of Radiohead's 1997 album OK Computer and its eight B-sides, plus three previously unreleased tracks: "I Promise", featuring strummed acoustic guitar, marching band-like drums, and Mellotron; "Man of War", a ballad with strings, piano, and electric guitar; and "Lift", a Britpop-like ballad. The special edition includes the album on vinyl, a hardcover art book, a book of notes written by the songwriter, Thom Yorke, and a sketchbook of preparatory artwork by Yorke and the cover artist, Stanley Donwood. It also includes a cassette containing audio experiments, session recordings, demos (including demos for two previously unheard songs), and early versions of four songs released on later albums: "The National Anthem", "Motion Picture Soundtrack", "Nude" and "True Love Waits". The final track on the cassette, "OK Computer Program", comprises computer tones. When run on a ZX Spectrum computer, the tones load a short computer program. The program lists the band members and the date 19 December 1996, plays several minutes of electronic tones, and displays the text: "Congratulations... you've found the secret message syd lives hmmmm. We should get out more". OKNOTOK is dedicated to Rachel Owen, Yorke's ex-wife, who died from cancer months prior to the release.