This book systematically teaches "problem-solving skills" useful in the business world. It covers frameworks for organizing issues and finding breakthroughs, including MECE, logical thinking, and hypothesis-driven thinking. [Product Condition] - With cover - Generally in good condition, but with some minor scratches and wear from storage and use. - No writing (confirmed) Recommended for those interested in business books, consulting thinking, and logical thinking. Instant purchase OK, free shipping, and will be carefully packaged and shipped! Feel free to ask if you have any questions.