A customer did put together a video tutorial based on his experience getting this working. You can find it here: https://www.youtube.com/channel/UCxBP0QpO2IGwo9F2TcfUNhg/videos
At last after several hour try I was able to make it and noticed that main problem was that the Ajax script was not generating on the page.
Now I got other problem as this dynamic dependent drop down is populating on the POST form where my requirement is the generated value I need to submit as GET to filter the record. Example on the books reading page I have to filter out the book by bookID and then by SectionID and this value I need to pass via GET so that the url is visible for the values. I could easily get the bookID value but how to get the SectionID value as it is in the child page and on the main page it is bringing the whole drop down inside a POST form.