This Day in History: br John Lennon’s 'Imagine' Is Released .br October 11, 1971.br "Imagine" was recorded br by Lennon with producer br Phil Spector in a single session br at his country estate, Tittenhurst Park.br While Lennon constructed the br song, "Imagine" was heavily br influenced by Yoko Ono's br book of poetry, 'Grapefruit.' .br Ono was recognized as br co-writer of the song in 2017.br The song's radical br vision of idealism and peace br immediately struck a chord br with a world disillusioned with war.br Released just over a year after br the break-up of the Beatles, "Imagine"br became a massive success, easily the br most successful song of Lennon's solo career.