This book addressed some of the trickiest challenges I've been facing for years in Product Development, Software & Hardware Engineering, agile transformations, and simply modern management practices. If you work on any teams within any technical field and want to go faster, then I'd suggest reading this book; especially if you work in an organization of 50 to 500 to 1000s of staff.
As an agile coach and practitioner , I've had a pretty deep understanding of the core aspects of agile, but this book solidified many of those concepts. Along with the companion book (which is setup as a never-ending series of experiments), I'm able to answer and articulate responses to the toughest questions from agile skeptics, ranging from the why, what, and how of small-to-large-scale agile/scrum transformations and kaizen.
The biggest lesson I learned from this book is to take a deeper look into the organization to see how the agile teams are fighting institutional inertia. For example, OKRs and agile work beautifully together, but if you cascade OKRs down to silos then to individuals, then the OKRs and agile processes are fighting each other. HR, recruiting, and the whole organization needs to either "be agile" or at least "be agile-aware".