It is a very interesting and useful book for anyone who wants to deal with anything business-related but also for managers (towards the end I mention these advantages), and more for tech startups which was the type of company the author had founded with this methodology (although it refers to many other types of businesses such as the automotive industry, education, government startups and many others). It is written in a unique way where each rule of this methodology is verified by examples of multiple companies that have applied it, something that arouses your interest and greatly facilitates the rule to stay in your mind. The definition of each rule is written and then various examples of its application are mentioned, the book has MANY examples. Something that is not mentioned in the book (this is not its purpose from the beginning) is raising capital for the establishment of the startup but on the contrary it refers to an already established startup which has some kind of funding behind it, that is, it refers to the process of keeping your already existing startup in a state of high productivity and keeping it alive. It also places great emphasis on effective data collection and the role that different teams of a leader play together for a common goal rather than being confrontational. It also refers very much to how all the aforementioned can be applied to management. I highly recommend it!