Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An impenetrable fortress of kick-a** music!!!

Heep proves, once again, that rock'n'roll can take us to a higher plane. MAGICIAN'S BIRTHDAY is a spectacular, at times haunting, and ultimately glorious celebration of the magic and mystery that - all to often - escapes our notice in this work-a-day world. Kudos to the band for sharing some of this magic with the rest of us. I'm eager to find a copy of the short story upon which it's based.