Jimmy Page had teased that previously unheard music will also be coming, and last month the band announced an expanded box set version of their 1976 live album The Song Remains the Same. It's set for a Sept. 7 release, to coincide with the 50th anniversary of their first show together.
The band recently released the first song from the box set, a remastered version of "Black Dog," which was included in the 2007 reissue of the album but not on the original version.
You can pre-order Led Zeppelin by Led Zeppelin on publisher Reel Art's website, while The Song Remains the Same can be pre-ordered on the band's website.