Elspeth Sharp & Margaret Harrison 
Good Witch Wilma on the Train [EPUB ebook] 

From naughty to nice! Children all over the world will love Good Witch Wilma who whooshes in to encourage them to do the right thing no matter where they are. She is invisible to adults yet children just know if they are naughty she will be around.
In this book, Good Witch Wilma whooshes in on Louisa and Kate on the train.
Others in this series are:
Good Witch Wilma at the Museum
Good Witch Wilma at the Caf
Good Witch Wilma at the Playground
Ideal for parents and teachers to reinforce positive behaviours and manners in children of all ages.