Check out the source: https://amzn.to/3FLz5pG The Beatles Anthology: While largely interviews, it provides direct quotes and perspectives from the band members themselves on their recording process and experiences. https://amzn.to/441R4jH Recording the Beatles by Kevin Ryan and Brian Kehew: An exhaustive and highly technical deep dive into EMI/Abbey Road studios, their equipment, and recording techniques used by The Beatles. Essential for understanding the impact of the four-track machine. | Bea