I read it and followed the treatment plan extensively for at least 8 months. Stopped because it didn't work. Plus, when I read in the book that "this includes free consultation with a neurologist/speech pathologist", and "free video call with lee lovett...", and more such lines that this book will give you so many free access and more shit; I contacted them over email and they only pitched me to buy some of their plan first (it did include a free consultation with one of their employee and not the author). TLDR: The book is full of fake promises and too much repetitive sentences over chapters.