Win The Book Thief on Blu-Ray

We have The Book Thief on Blu-ray for you to win...
To be in to win simply answer this question...

Who wrote the Best-Selling book that this film is based on?

Email your answer with your contact details to win@bigscreennz.com by Wednesday the 14th of May 2014.
(Please put "The Book Thief" in the subject line)
The Premise
Based on the beloved international bestselling book, The Book Thief tells the story of Liesel (Sophie Nelisse), an extraordinary and courageous young girl sent to live with a foster family in World War II Germany. She learns to read with encouragement from her new family and Max, a Jewish refugee who they are hiding under the stairs. For Liesel and Max, the power of words and imagination become the only escape from the tumultuous events happening around them. The Book Thief is a life-affirming story of survival and of the resilience of the human spirit.
Starring Sophie Nelisse, Geoffey Rush and Emily Watson.