The First 90 Days is a comprehensive guide designed to help leaders navigate the initial phase of taking on a new role, whether in a new company or a new position. Michael D. Watkins presents a framework to help leaders build momentum early, avoid common pitfalls, and set themselves up for long-term success. The book emphasizes the importance of learning the new organizational culture, establishing key relationships, aligning with stakeholders, and creating a strategic plan. Watkins provides tools, checklists, and real-life examples to equip leaders with the confidence and knowledge they need to succeed.