The book "The End of Fundraising: Raise More Money by Selling Your Impact" by Jason Saul. The book argues that traditional fundraising methods are becoming ineffective in a world where donors are increasingly acting like consumers. It proposes a new approach to fundraising that focuses on identifying and meeting the needs of "impact buyers" - individuals and organizations who are willing to pay for the social outcomes that nonprofits produce. The author advocates for nonprofits to shift their focus from simply "doing good" to creating quantifiable value and selling their impact to these impact buyers. He provides specific examples of how different nonprofits can identify their impact buyers, measure their outcomes, and create compelling value propositions that resonate with these stakeholders. The book emphasizes the importance of moving away from the traditional "psychic benefit" model of fundraising, where donors give primarily for emotional reasons, to a more market-driven approach where nonprofits can secure funding by demonstrating their ability to deliver real and measurable social change.