This was Iron Maiden's first full-length studio album, although it contains a couple of re-recorded versions of tracks from The SoundhouseTapes. Most of the songs on this album had been played by the band during the previous several years during their endless series of small gigs at various clubs and pubs around London . For this reason, the album contains a wide range of material that is not really unified into any specific theme or style. The sound is also a bit different from the later albums to which most Maiden fans are accustomed, but after several listens their unique power and depth begin to sink in. This is particularly astonishing because although Will Malone was officially the producer for the album, he never contributed much and the album production was mostly done by the band and the recording engineer. So although the production is a bit primitive, the album virtually explodes with raw energy and power. Several of these tracks have become Maiden classics and still almost mandatory at every Maiden concert..