I bought this book to get a complete picture of learning disabilities (or "dys") and it met my expectations. It is not necessarily intended for the general public as a first reading but for readers who already have "digested" other more affordable works. Technical terms are defined and illustrated, it is very useful, especially when trying to understand and appreciate the assessments made axes proposed rehabilitations. Many references to scientific studies to judge the seriousness of the authors' approach, which are references in the field of "dys". I do not regret my purchase, and I often go back into this work because it is really a reference. NB The book is supplemented by online videos, very well done.