In 2020, engineering firm Velentium faced an unprecedented ask: partner with a small medical device company and a very large vehicle manufacturer to increase emergency ventilator production from hundreds per month to thousands per week—in just twenty-eight days. Serving on the frontlines of pandemic response is enough pressure to cause any size business to buckle, but the small firm thrived and even doubled in size to complete their manufacturing scale-up known as Project V: seven months of work in six weeks. Velentium's cofounder Dan Purvis attributes their extraordinary success to their decade-in-the-making company culture, which buoyed them in the face of an unforeseeable crisis. In 28 Days to Save the World, he lays out how to harness the power of organizational culture to prepare your small business to weather any challenges ahead. Every quarter, more than 30 million small-business entrepreneurs face innumerable familiar crises that can spell their doom. Drawing from his twenty-five years of experience as a small-business leader, and with gripping stories from Project V, Purvis reveals crisis-tested methods for turning challenges into opportunities.