This text asks three questions about supervision: what do we really know about the supervision of therapy and counselling?; what kind of things make it easier, and what gets in the way?; and how do therapy and supervision resemble each other, and in what ways do they differ? In answering these questions the text brings together a variety of differing perspectives and orientations. Although strongly influenced by psychoanalytic ideas, the book also offers humanistic insights into good supervision practices.