Loneliness is a very common phenomenon among children and adolescents. It has many reasons: inability to communicate, the desire to escape from reality, character traits, physical disabilities, problems in the family, rejection by peers... All this traumatizes the child’s psyche, and the consequences of such trauma can affect a lifetime. Finding himself alone, the little person suffers, but often rejects any attempts to help him. What to do in such a situation, how to prevent the child from becoming convinced of his inferiority and becoming bitter against the world? In the book “Zero Friends: How to Help Your Child Cope with Loneliness,” experienced child and adolescent psychologist Niina Junttila talks about the most common models of loneliness, gives many examples from her own practice, explains the essence of the phenomenon and gives parents and teachers wise advice on how to find an approach to lonely children and teenagers and provide them with timely help.