* _Ashleigh's Angels_ (2009)
* _The Bay of Lost Souls_ (2012)
* _The Last Song_ (2013)
* _The Weight of Dreams_ (2014)
* _The Girl in the Tower_ (2015)
* _The Lost Island_ (2016)
* _The City of Mirrors_ (2017)
* _The Secret Garden_ (2018)
* _The Island of Secrets_ (2019)
* _The House on the Hill_ (2020)
* Non-fiction:
* _The History of the World in 50 Animals_ (2011)
* _The History of the World in 50 Plants_ (2013)
* _The History of the World in 50 Buildings_ (2015)
* _The History of the World in 50 People_ (2017)
* _The History of the World in 50 Maps_ (2019)
* Children's books:
* _The Adventures of Captain Bobble Beard_ (2011)
* _The Adventures of Captain Bobble Beard: The Search for the Lost Treasure_ (2012)
* _The Adventures of Captain Bobble Beard: The Battle of the Bad Bananas_ (2013)
* _The Adventures of Captain Bobble Beard: The Quest for the Golden Fleece_ (2014)
* _The Adventures of Captain Bobble Beard: The Voyage to the Center of the Earth_ (2015)