You are 100% wrong. Stone interviewed Bezos many times over the years, just not expressly for this book. (Bezos refused.) Bezos did give permission for many of his friends and colleagues to speak to Stone, so he did cooperate in a fashion.

Reporting on a subject without interviewing them is so common, and so necessary, that journalists have a term to describe it. It's called a "write-around."

Full disclosure: I worked with Brad Stone for two years.