In the decades since Led Zeppelin called it a day, they've rarely opened up their vaults to release non-album material. There's been a live album (2003′s How The West Was Won), a collection of BBC recordings (1997′s BBC Sessions), a compilation of outtakes (1982′s Coda) and the document of their one reunion concert (2012′s Celebration Day).

That's one of the reasons that the recent announcement that Zep would be reissuing their entire catalog with bonus tracks was such a big deal. The other: the original tapes were remastered by Jimmy Page himself.