The Silver Door

From Author Wars - https://authorwars.com/publications/the-silver-door-383880.html

Overview:

Title: The Silver Door
Author: Emily Rodda
Year: 2012
ISBN-10: 9781862919136
Publisher: Omnibus Books / Scholastic Australia
Price: A$16.99
Pages: 278
Binding: Trade Paperback
Type: Novel
Title Reference: The Silver Door
Notes:
- Month of publication probably April. (Copy used for this data purchased at an Australian retail outlet on 5 April 2012, so no later than April.) (Several Australian on-line bookshops give 1 April.)
- No printed price. Price from publisher's website [here]. (11 April 2012).