I grew impatient with the speech therapy waiting list, and decided to shell out for this book before exploring private options. I'm very glad I did. The first section is not rocket science, but it is quite encouraging to hear that you are doing some of the right things already, and it's probably not all your fault that your child is struggling with speech. Thus far the main advice from the health visitor had been to turn off the TV (we don't own one).
The book divides communication into four stages (Discoverers, Communicators, First Words Users, and Combiners), and further splits this down into receptive and expressive language. So my child is currently a First Word User in terms of understanding, and a Communicator in terms of speaking. I found this analysis really helpful, and the authors refer to it throughout the book to help you decide which techniques and ideas are most applicable to your child.
I suspect I will refer to this book, but my main practical take away points from first reading are:
-It's helpful to sometimes model to your child how they might talk back to you. So don't always say ' Yes! A cat! What a big black cat! It's sitting on the wall.' Sometimes, just say 'Cat!'.
-In the latter part of the book they encourage you to really hone in on a precise strategy for a few particular areas, to persuade your child to say just one or two more things. They have some great ideas. We are currently focussing on 'Wheeeee' when coasting on the balance bike, and 'Shhhhhh' to ask to be pushed again in the swing.
I have already had better specific advice for my child from this book than from any health professional thus far. I don't know what the future holds for us, but I can see that it would continue to be highly relevant through the stages of speech development.