Earlier in the year, the band re-released their first three albums: Led Zeppelin, Led Zeppelin II, and Led Zeppelin III.
Led Zeppelin IV (technically untitled) was released in 1971. It features classics like Stairway to Heaven, Rock & Roll, Black Dog, and When the Levee Breaks. It is the band's best selling album, with 37 million units sold worldwide. It has sold more copies in the United States than any other album except for Michael Jackson's Thriller.
Houses of the Holy, released in 1973, went platinum 11 times. It features classics like The Song Remains the Same, The Rain Song, and Over the Hills and Far Away.
Like the previous reissues, deluxe editions of the albums will also be available. The deluxe edition of IV will include previously unreleased versions of the songs that make of the album. The deluxe edition of Houses of the Holy will include rough mixes of some songs along with two songs that include varied instrumentation.