Being taken to see a doctor for the first time can be scary, whether it's a visit to the GP, optician, dentist or to the hospital.
Sharing a book about other children visiting a doctor could make the experience less worrying.
It can feel very strange when a part of your body does something you don't expect - for instance when you get your first wobbly tooth. Sharing books about teeth (wobbly or otherwise) can be comforting and may help children deal with this new situation.