This book basically contains a serie psychoanalytical analysis analysis of children. Dolto is well known in the psychoanalytical society for her work with children(although she also did work with adults). It is important to note that her work is heavily influenced by the structuralist Lacan. Dolto tries to showcase how psychoanalysis helped the children, in some pages we can even see some of their drawings with some interpretations.
To be honest, this book is mostly designed for someone who has a good enough understanding of psychoanalysis as it features a lot of techincal terms and concepts that might be difficult to understand for a non specialised audience.
All in all, I think this book is a good read for someone who knows about psychoanalysis, is curious or studying a field related to psychology or human science. Keep in mind that if u know psychoanalysis and read a lot of it this book will probably not change the way you look at this discipline. Still reading it is not too hard if u git the basic stuff and maybe it's not a bad ides to make it your first dolto book. Getting to know dolto is important in the academic field. Although, as tend to be the case with most psychologists or psychoanalyst this is a rather controversial person.
Some people love her, others hate her. What will it be? I'd say it's up to you to decide how you chose to look at her and her work.