The 40 Greatest Led Zeppelin Songs of All Time: 'What Is and What Should Never Be' 1969

The 40 Greatest Led Zeppelin Songs of All Time

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'What Is and What Should Never Be' (1969)

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One of Plant's earliest songwriting attempts is allegedly about an affair with his wife's younger sister. Its woozy production and bulldozer gearshifts from tender, pastoral verse to demon-steed chorus make for music strung between lover's plea and torrid fantasy.