I am a psychologist and mother, with a 6 year old autistic son. I first read this book when he was about 18 months old, and I waited patiently and eagerly for him to begin talking. He didn't... and didn't... and didn't... because one of the hallmarks of autism is a language delay. It would be another 3 years before I really knew what his voice sounded like. Nonetheless, this book was a godsend for us, because, really, it teaches parents how to read and respond to their children's emotions, no matter what modality they use to communicate them. And what my child needed more than anything else was to have someone who could understand how he was feeling, and give words to those feelings, because he could not. "How to Talk So Kids Will Listen" gave me the tools to hear him and help him, even though he was not talking.
Now, at age 6, he is talking a lot, reading even more, and is a happy, joyful, confident child, far from the stereotype of his disability. I believe that much of his positive emotion and self-esteem comes from knowing that his feelings are understood and respected, despite the communication barriers we face. Those are gifts I was able to give him because of the strategies I learned from "How to Talk..." We still have a long road to travel, but so does every parent. But rest assured, ALL of Faber and Mazlish's books will be making the journey with us.