from the back cover:
Help your students read their way to better English with this new edition of the world's best graded readers - now with a new range of World Stories, fully revised Factfiles, more audio, and new tests.

The new edition includes the original Bookworms stories, plus the Starters, Playscripts and Factfiles, making it easy for you to see the full choice of books at each Stage.

The highly acclaimed seven-stage system of grading, from Starter to Stage 6, remains the same, helping you to find the right level for all your students.