New “Anthology” music will be released on Nov. 21. A fourth album, to be released alongside remastered versions of the first three, includes 13 previously unreleased demos, session recordings and other rare recordings.

The Beatles Anthology will get a musical update as well. The original set of three double albums, remastered by Giles Martin, will be accompanied by Anthology 4, a new disc of 13 previously unreleased demos and session outtakes plus other rare recordings.