Lol, what were long only futures funds investing in before he published his book?
He did more than predict the boom, he caused it. His book, along all with the interviews he gave to the financial press to promote his book, raised awareness of commodities as an alternative asset class. Long-only futures funds piled in and ran up energy prices beyond any physical demand/supply dynamic could explain. As a result of this fund-driven activity, a new category was created in the COT report.