* The Unremembered (2001)
* The Girl Who Came Home (2003)
* The Memory Stone (2005)
* The Shadow on the Wall (2007)
* The House of Whispers (2009)
* The Secret of the Lost Village (2011)
* The City of Shadows (2013)
* The Island of Secrets (2015)
* The Castle of Doom (2017)
* The Mountain of Fire (2019)
Non-Fiction
* The History of the World (2010)
* The Science of the Universe (2012)
* The Art of Writing (2014)
* The Power of Love (2016)
* The Beauty of Nature (2018)