Released in October 1969 (just nine months after the self-titled debut), Led Zeppelin II, known affectionately as "the Brown Bomber,” was written and recorded while the group toured relentlessly to support their debut album. Though it was assembled in numerous studios, band guitarist Jimmy Page performed his usual production magic and gave the album a uniformity of sound that emphasized the monster riffs that formed the basis for heavy metal. The endless touring ensured that many of the songs were written as riffs and later finessed in the studio. Nearly every song here became an FM radio staple. This 2014 deluxe edition, remastered by Page, includes alternate mixes of four songs from the album, plus backing tracks to “Thank You,” “Moby Dick,” and “Living Loving Maid (She’s Just a Woman)” and the previously unreleased track “La La.” Hearing these songs pulled apart as such lets the hardcore fan better understand how the final versions came to be. They also illustrate the genius of engineer Eddie Kramer, whose work with Jimi Hendrix had impressed the band, including Page.