Bruce Springsteen is to release seven albums of mostly unheard material this summer.
The US singer said the songs, written and re-recorded between 1983 and 2018, were being made public after he began completing "everything I had in my vault" during the COVID-19 pandemic.
In a short video posted on Instagram, Springsteen said the albums were "records that were full records, some of them even to the point of being mixed and not released".
The 83-song collection is being released in a box set called Tracks II: The Lost Albums and goes on sale on 27 June.
Some 74 of the tracks have never been heard before.
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The 75-year-old first teased the release on Wednesday morning with a short social media video accompanied by text which said: "What was lost has been found".
Tracks II is the follow-up to the star's first Tracks volume, a four-CD collection of 66 unreleased songs, released in 1998.
The New Jersey-born rocker, nicknamed The Boss, last released a studio album in 2022.
Only the Strong Survive was a collection of covers, including songs by Motown and soul artists, such as the Four Tops, The Temptations, The Supremes, Frankie Wilson and Jimmy Ruffin.
The late soul legend Sam Moore, who died in January and was a frequent Springsteen collaborator, sang on two of the tracks.
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Springsteen is coming to the UK in May to launch a two-month tour of Europe with his E Street Band.
The shows will include performances at the Co-op Live in Manchester and Liverpool's Anfield stadium.
The singer-songwriter has sold more than 140 million records since his debut on the music scene in 1973, according to his website.