One major difference between consulting-oriented books, like this one, and research-oriented books is breadth vs depth. Consulting-oriented books typically try to talk about everything briefly in catchy but sometimes vague ways, while research-oriented books typically talk about something very specific in elaborate but sometimes gnawing detail. Coming from a research background, the consulting-oriented approach ultimately does very little for me. That's my bias up front.
I do, however, admire Lolly's consulting experience and what she attempts to offer in this book. I think it's great that individuals with hard earned experience attempt to creatively organize their experiences such as the 'leadership types' and 'leadership gaps' offered in this book. However, I find based on my reading of the leadership literature that we've moved past leadership characteristics a long time ago. This is in large part because relatively stable categories and labels are hard to change once we adopt them and the goal here is to offer some ways that people can improve their leadership. While it may be insightful, if not entertaining, to categorize yourself as a specific leadership character (be it a rebel, explorer, truth teller, hero, inventor, navigator, or knight as Lolly describes) and to identify common gaps (labelled as the exploiter, deceiver, bystander, destroyer, fixer, or mercenary in this book), it's not entirely as productive as we think it could be based on what we know about behaviour change and leadership development. This is potentially a way to get people to start thinking about things, but real change comes from focusing on that which can be changed, such as behaviour and attitudes. That said, some may find this book useful if leadership is a real problem, but there are much more rigorous and empirically supported frameworks for leadership and approaches to leadership development out there.