I'd recommend the Battle of the Book list from the school since many students seem to have enjoyed the Grade 5 Battle this year.
Here's the list from the school website:
2012-13 HK Battle of the Books Aiken, Joan. The wolves of Willoughby Chase. New York: Dell Yearling, 2001. Print.
Beck, Ian. Pastworld : a mystery of the near future : a novel. London: Bloomsbury, 2009. Print.
The boy in the striped pajamas. Miramax Home Entertainment, 2009. Film.
Broach, Elise. Shakespeare's secret. New York: Holt, 2005. Print.
Choldenko, Gennifer. Al Capone does my shirts. New York: Putnam's, 2004. Print.
Creech, Sharon. Bloomability. New York: J. Cotler Books/HarperTrophy, 1999. Print.
Funke, Cornelia C. Inkheart. New York: Scholastic, 2005. Print.
Hesse, Karen. Out of the dust. New York: Scholastic Press, 1997. Print.
Higgins, F E. The black book of secrets. London: MacMillan, 2007. Print.
Jiang, Ji-li. Red scarf girl : a memoir of the Cultural Revolution. New York: HarperTrophy, 2004. Print.
Nicholson, William. The wind singer. London: Egmont, 2008. Print.
Paterson, Katherine. Jacob have I loved. N.Y: HarperCollins, 1980. Print.
Tolkien, J.R.R. The Hobbit or there and back again. Boston: Houghton Mifflin Co, 2001. Print.
Whelan, Gloria. Homeless bird. New York: HarperTrophy, 2001. Print.
For other books try this link with more recommendations: