I don't know who said it, but I agree, "If no one ever does anything differently, no one learns anything."
Pete now has 4 books available for purchase (as I understand it) and they're listed on his youtube channel, Omega Iota Fitness in the About section.
His philosophy of pursuing the good feel of exercise is reflected in the name of his channel. "Omega Iota" represents receiving the most (omega) benefit from the least (iota) effort. This philosophy has guided his journey which may appear a bit unorthodox to those who are used to "training" and "working out" in the popular gym setting and culture or who use the equipment at home in a similar way.