The First 90 Days, Updated and Expanded : Proven Strategies for Getting Up to Speed Faster and Smarter is a business book by Michael D. Watkins, published by Harvard Business Review Press in 2013. The hardcover edition features 304 pages and provides strategies for leadership, career development, management, and strategic planning. The book is illustrated and offers valuable insights for those looking to quickly get up to speed in their professional roles. With its practical advice and clear language, it is a valuable resource for anyone looking to advance their career in business and economics.