“The concepts in this book can be applied to any type of product or business idea. It's a clear and concise way to make sense of the chaos in your head and build something people will actually buy.”
— Ben Baxter, Strategic Product Director, Google
“J has helped us deliver amazing value to our customers time and time again. His ability to take nebulous concepts and drill down until they become quality products is second to none.”
— Adam Ferrando, Manager of Sales Technology, Delta Air Lines
“This book clears up so much about the process of building products and makes it easy for designers, developers, and business people to understand and apply.”
— Jina Anne, Design Systems Leader, formerly Salesforce, Amazon, Github, Apple