I tried these brushes on a new Braun Oral B and they just did not "rotate" properly compared to the set supplied with the brush so are utterly useless. Avoid this product. You are better off using a normal manual toothbrush.
I bought this book for the wife to help with the Child Care Diploma she is doing at the moment. She is absolutely delighted and uses it as her first coursebook now. It's beautifully produced and edited with all the main points clearly stated in plain English.