April 2024 saw the fortieth anniversary of The Blue Nile's first album, A Walk Across the Rooftops. Only four albums – containing a total of just 33 songs – have followed from the publicity-shy trio. Yet scarcity has served only to intensify love for the band's intensely confessional, melancholy, atmospheric songs that document city streets, headlights, cars, rooftops, rain and couples in love.

The Blue Nile are truly one of modern music's greatest enigmas, and here, for the first time, Allan Brown, a fan from the early 1980s and friend of the band's composer Paul Buchanan, gets behind the veil to analyse the band's appeal through his own memories, critical study, personal encounters and access to unreleased recordings.