Yes! this book is a first-person account of product development at Apple, showing how both the design and the features of a system tool keep progressing under the selective pressure of iterative review sessions, with creative and specific challenges provided by managers at multiple levels, all the way to the top (Steve Jobs at the time of the book's tales). It's a great book, very well written, the only one I've read that provides insight into (some of) Apple's creative process. When they say that Steve's DNA has profoundly shaped the company, I imagine this is one aspect of what they mean.