This book explores some essential nonspecific factors of child psychotherapy. It is based on video transcripts and discussions of four outstanding child therapists during a two-day conference in Copenhagen in June 2013, pinpointing the moments of meeting and moments of change irrespective of method.Research has shown that nonspecific factors such as relationship and personality have a stronger correlation to outcome than method. The basic argument of Through Windows of Opportunity is that skilled psychotherapists do similar things while describing them differently, and that psychological healing is created in the context of relationship. Presenting therapists here include Peter Levine from the USA (working with Somatic Experiencing on trauma states); Jukka Mäkelä from Finland (with Theraplay, working with disorganized attachment); Haldor Øvreeide from Norway (with a therapeutic conversation in a disrupted son-mother dyad); and Eia Asen from the London Marlborough Clinic (with systemic and mentalization-based family therapy working on a dependent attachment pattern). The closing chapters of the book summarize the high points of the discussions among the four therapists about nonspecific but shared aspects of their interventions, moderated by Susan Hart and Marianne Bentzen.