Do you think this book would be good for a sales engineer inside a larger organization?
In particular, stuff like digging beneath requirements & feature requests to understand the root cause and their current behavior. And probably also the general idea of opening up a safe space for open learning at the beginning of each conversation (which is also a common idea in other sales approaches like SPIN Selling).
Also, it would be more useful while scoping out a new product/market, and less useful for products that are already mature/defined.
So my guess is that you'd get a couple useful ideas, but not a book's worth.