I do not aspire to be a manager, however I wanted to read this book. I wanted to get to know what type of problems you might face as a manager.
Despite this, the book was useful for me. I am always allowed suggesting how we can improve our processes and what we should change.
If you are a manager, I would recommend this book to you; if you are not you also should read this book. You do not have to read the whole content (some subchapters are written precisely for managers), but after reading you should know better why some actions had been executed, why some operations are necessary, and the most important: how to get along with your manager.