The seven unreleased tracks on the companion audio disc include rough and working mixes for The Ocean and Dancing Days that reveal a deeper look inside the recording sessions of these classic songs. Other standout recordings include the guitar mix backing track for Over The Hills And Far Away, and a version of The Rain Song without piano.

A quick follow-up to Led Zeppelin I, the album was recorded while the band was touring and consists of reworked blues and rock and roll standards the band was playing at the time.

Features recordings from Led Zeppelin's 2007 concert at London's O2 arena held as a tribute for Atlantic Records founder Ahmet Ertegun.

"After the group's 1970 album Led Zeppelin III received lukewarm reviews from critics, Page decided their fourth album would officially be untitled. This, along with the inner sleeve's design featuring four symbols that represented each band member, led to the album being referred to variously as the Four Symbols logo, Four Symbols, The Fourth Album, Untitled, Runes, The Hermit, and ZoSo (which was derived from Page's symbol). In addition to lacking...

Selected and remastered by Jimmy Page from a series of live performances for British radio in 1069 and 1971, these tracks were once among the most popular bootleg items of the '70s.

Good times, bad times (2:48) -- Babe I'm gonna leave you (6:41) -- Dazed and confused (6:27) -- Communication breakdown (2:29) -- Whole lotta love (5:34) -- What is and what should never be (4:44) -- Immigrant song (2:25) -- Since I've been loving you (7:24) -- Black dog (4:54) -- Rock and roll (3:41) -- The battle of evermore (5:52) -- When the levee breaks (7:08) -- Stairway to heaven (8:02).