Book excerpt: Reflective Network Therapy describes a remarkably effective school-based treatment method that harnesses small social networks for the good of seriously emotionally disturbed preschoolers or those with autism spectrum disorders. The book provides an in-depth explanation of the method — including the work of parents, peers, teachers, and mental health therapists. The RNT method has a substantial evidence base, with about the same number of treated children and a larger number of comparison and control cases as the published IQ results of the most widely used school based method. It has been used in many real life environments and is well-tested for feasibility, replicability, IQ effects, and children's global mental health results. The RNT method does not separate the child from peers by pairing him with an aide but is peer, teacher and parent inclusive. The cost-benefits and human benefits are extraordinary.