Horngren’s Cost Accounting (18th Edition) presents cost accounting as a strategic tool that helps managers make informed decisions based on the principle of “different costs for different purposes.” It combines traditional and contemporary approaches while emphasizing the technical competencies and professional behaviors required of cost accountants. The edition incorporates current topics such as generative AI and the long-term effects of the COVID-19 pandemic. Numerous real-world examples illustrate how cost accounting supports sustainability, innovation, and economic transformation.