One of the best albums in the world (in my opinion). This is Led Zeps most diverse in album int the way of the each song has it's own genre. Best song to open this album is Custard Pie, pure rock and roll, precursor to what would be known as heavy Mettle/Metal. This album has marked it's territory in music history. Three of the most popular song are on this album: Houses of the Holy, Trampled under foot, and Kashmir. This is a must get for any Heavy Rocker/Led Zep fan; and even someone who is into Jazz, soul, funk. Its also worth it for the companion disc.