Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Entertaining & Informative look into British recording history

Naturally, George Martin's association with The Beatles as their producer gets a good amount of ink, but having read so much about that in other publications, I found the book to be more interesting from a standpoint of how far the recording industry had come from the time Martin entered it, to when when the book was published in the mid-90's - literally from direct-to-wax recording, using hanging-weight gravity propulsion for record cutting machinery, to multi-track recording capability. For anyone with a fascination, or even a cursory interest, in the history of audio recording, "All You Need Is Ears" is a fun and informative read, which I found hard to put down until the end. And, even with all I had read about The Beatles' recording sessions, there were still a few surprises from Martin's memory archives.