Oxford Bookworms Library: Level 3:: 47 Ronin: A Samurai Story from Japan : We have recently checked all of our Graded Readers against the latest CEFR standards to give each book an accurate language l by Jennifer Bassett

The most consistent of all series in terms of language control, length, and quality of story. David R. Hill, Director of the Edinburgh Project on Extensive Reading.
Binding: Paperback / softback