Rafaela Tijerina first met la señora at a school in the town of Lost Hills, deep in the farm country of California’s Central Valley. They were both there for a school board meeting, and the superintendent had failed to show up. Tijerina, a 74-year-old former cotton picker and veteran school board member, apologized for the superintendent — he must have had another important meeting — and for the fact that her own voice was faint; she had cancer. “Oh no, you talk great,” the woman replied with a warm smile, before she began handing out copies of her book, Rubies in the Orchard: How to Uncover the Hidden Gems in Your Business. “To my friend with the sweet voice,” she wrote inside Tijerina’s copy.