This is book 4 in Troubletwisters .

This book has been graded for interest at 8-12 years.

There are 320 pages in this book. This book was published 2014 by Scholastic Press .

The two Australian authors, Anna Fienberg and Garth Nix, live in Sydney. Anna is known for her popular stories for all age groups. Garth is known for his teenage fantasy novels. New York Times bestselling author Sean Williams lives in Adelaide, South Australia. He is the author of over 6- published short stories and 22 novels, and has written several novels in the Star Wars universe.