These days bands change members like some of us change Brita filters, but back in the mid-70s lineup changes were a pretty scary proposition. Could you imagine Bad Company with a different singer, then? Anyway, Purple was one of the bands that had rotating members from day one. While it's true that Blackmore was the core in a lot of ways, and certainly that Mk II was the "classic" lineup, Mk III and Mk IV have a lot to offer, as this overdue official bootleg proves. Featuring only two lifetime members in Lord and Paice, Mk IV also features a solid singer in Coverdale, an equally solid singer and bassist in Hughes, and a great bluesy guitarist in Tommy "make sure I keep the heroin mixed right so I can play tonight" Bolin. Blackmore is and was a perfectionist and technical virtuoso -- not suprisingly he was Yngwie's hero as a boy. But like Yngwie, Ritchie tended to err on the side of technique rather than feel. Bolin was American, young, and on a lot of drugs. He also came from the blues (as party) as opposed to the blues (as the modern classics). Like Jimmy Page, Bolin makes a lot of mistakes and is more about vibe than precision -- but the result is a unique Deep Purple experience which remolds songs you know in a new, urgent, and somewhat funky way, and introduces a few you might not know. If you don't know Purple, this is about ten tenth or fifteenth album you should think about, but if you're tired of listening to Deepest Purple, Machine Head, In Rock, or MIJ for the eight-billionth time, check this out. Also, this (the Euro/DPAS version) has MUCH superior packaging to the (US) King Biscuit release, as well as a better track arrangement.