This book is part of a book series called Gateway Trilogy .

This book has been graded for interest at 10-13 years.

This book was published 2007 by Random House Books for Young Readers .

Isobelle Carmody wrote the first book in the Obernewtyn series over ten years ago. Since its publication this series has consistently been on the Australian bestseller list. Isobelle divides her time between Australia and Prague.