Yes, MI has been around for many years, and this is the 4th edition of this book, but there are new studies, new ideas, and new examples to be learned.
I like that one of the chapters in this book discusses how to teach students about MI. I used MI strategies and activities in class and briefly explained/described MI to students, but I never truly helped them to understand the concept and how it applied to their individual learning.
The book is set up chronologically, but based on a reader's knowledge of MI, you could skip around/go in different orders.
The author recognizes new developments in learning and assessment, so he makes connections to personalized learning, DoK, and standards-based assessment. I appreciate the lessons, charts, and examples included in the book, and I really like that each MI provides examples for all content areas.