I understand that you need audio to be put into a book containing 19 lessons. Do you have the audio recordings or I will have to record my own voice? What type of content does the book have? Math equations? Stories? Course book? You mentioned you need a 3D animation. I don't understand how that is relevant in this project.
I have good English pronunciation. If you need me to record my voice and attach it to corresponding pages, then I am the man for the job. If you have the recordings and you want me to attach to corresponding pages, that is also doable. Let me know.