With savvy and sass, Murphy’s narration traces his 13 months in the industrial hemp business from the initial purchase of a 36-acre farm in Boulder County, Colo., to the dispersal of a lot of expensive equipment at fire-sale prices.

Hes already had an all-over-the-map career as a small business owner, we learn in Rocky Mountain High. His companies imported sweaters from Ireland and cashmere from Scotland. He did private-label ma…