Oxford Bookworms Library (3 Ed.) 3: The Railway Children
We have to leave our house in London,' Mother said to the children. 'We're going to live in the country, in a little house
near a railway line.' And so begins a new life for Roberta, Peter, and Phyllis. They become the railway children - they know
all the trains, Perks the station porter is their best friend, and they have many adventures on the railway line. But why
has their father had to go away? Where is he, and will he ever come back?