After the blistering debut Metallica delve further into their psyche, further into their songbook and further into their fiercely traditional yet updated NWOBHM muse. And it's a more difficult metal experience in general, the songs on the debut cutting with a sharper knife whereas the numbers here tend to pound through only after repeated hammering with a blunter instrument. Fight Fire With Fire is perhaps the most similar to the songs of the debut and is the perfectly thought out album opener.