I learned the following after reading Wikipedia. "The advertising campaign was built around the slogans 'Led Zeppelin – The Only Way to Fly' and 'Led Zeppelin II Now Flying'." [source]
This is a heavy album from start to finish, filled with heavy guitar riffs, tireless vocals, thundering drums, and some delicious bass sounds. As usual, the critics were confused:
Critical reaction to Led Zeppelin II was not positive originally. John Mendelsohn wrote a negative review of the record for Rolling Stone, in which he mocked the group's heavy sound and white blues, while writing that "until you've listened to the album eight hundred times, as I have, it seems as if it's just one especially heavy song extended over the space of two whole sides". Robert Christgau jokingly referred to the band as "the best of the wah-wah mannerist groups, so dirty they drool on demand", while complaining that "all the songs sound alike". He nonetheless conceded that "Led Zeppelin simply out-heavied everyone" in 1969, "pitting Jimmy Page's repeated low-register fuzz riffs against the untiring freak intensity of Robert Plant's vocal. This trademark has only emerged clearly on the second album, and more and more I am coming to understand it as an artistic triumph." [source]I have a Canadian pressing (not the original) that I think came out sometime after 1978. The jacket of my copy looks mint, and the record is in fabulous shape too. I think there are more than 20 Canadian pressings of this LP, plus numerous 8-track, cassette, and CD issues.
The only track I am not crazy about is Moby Dick, partly because I think extended drum solos are kind of stupid. The guitar part of that song is great, though.