This book is the guided tour of the key innovative practices used inside Google, Toyota, and Facebook, that work in any business. What he does in this book is bring "lean" techniques to the startup process. The case study Eric uses within this book is his own. How we can all make assumptions about what customers want and how wrong we can be. He discusses Minimum Viable Product (MVP), how to get to the point of creating a MVP that people actually want. Nice methodology for any startup, especially if you are building a product, app etc. Eric has a nice writing style which keeps your interest and anybody in the startup world should read this and implement Eric's suggestions. I can only strongly recommend this book to anyone interested in startups or who would be keen to optimise current product development efforts in an established business.