SuperVision and Instructional Leadership is a textbook. It has the strengths and weaknesses of a textbook. It's long and comprehensive. The authors go into great detail about how to work with other teachers, including specific tasks and philosophies. The book talks about tangential issues like selecting curriculum, promoting school-wide change, professional learning communities, promoting social justice and democracy, interacting with the community, and pedagogy. At the end of each chapter the authors include exercises and assignments that a professor using this textbook could assign to the graduate students in the course using it. There is also a bibliography at the end of each chapter, and a shorter list of recommended readings.
As a teacher with 34 years of experience, I read the book to learn how I could better help the student teachers I work with, the members of my department that I lead and observe, and any other teachers in my school as the opportunity arises. I thought this book would be a good overview and foundation for future reading and could serve as a reference. I was not disappointed. Predictably, the author's world view is different than my own. As a Christian, I'm a big believer in human sinfulness, moral absolutes, and Truth with a capital T. The authors promote a philosophy of allowing students to pursue their own path, because there is no one right path. There unstated assumption seems to be that democratically run schools have the power to usher in an age of peace and harmony. I think there is some value in these ideas, but I disagree with their basic premises.
This book is no page turner, but if you'd like to know more about supervision and instructional leadership, this book is probably worth the slog.