Linda Silverman is a brilliant thinker, and her specialty is quirky gifteds. Another type of child who falls into her particular specialty is the dyslexic who has strong ability to visualize complex items, assemble toys, and so forth.
This is a wonderful book, chock full of amazing information. However, if your child doesn't fit exactly into the specifications, this book can be annoying. Many different types of children have many of the challenges mentioned in this book, and much of the information in this book should actually apply to all sorts of children, but it is framed tightly, pretty much only for the mega-gifted kid.
So this is a great book, As it says on the back, Dr. Silverman has worked with over 4,500 children, and she has a ton of wisdom to impart. It's almost 400 pages. But it's more of a data dump than a guidebook.
My advice? Use other books to give you an overview of the situation and help to create your own view and goals of your child's relationship to school. Figure out what the problems are and set some goals. THEN read this book. If you have a mental structure set up, you'll have places to tuck the information, and you'll be able to use it. Otherwise, it can feel like a 25 foot wave of information, knocking you over.