* The War with the Gnomes (2012)
* The Secret History of the Lizard People (2012)
* The Invasion of the Cat People (2013)
* The Rise of the Zombie Dogs (2014)
* The Return of the Vampires (2015)
* The Last Stand of the Humans (2016)
* The War of the Worlds (2017)
* The Day of the Triffids (2018)
* The Invasion of the Body Snatchers (2019)
* The Andromeda Strain (2020)
Non-Fiction:
* The Book of Lists: A Compendium of Curious Facts and Lists (2008)
* The Book of Lists: Volume 2 (2009)
* The Book of Lists: Volume 3 (2010)
* The Book of Lists: Volume 4 (2011)
* The Book of Lists: Volume 5 (2012)
* The Book of Lists: The Ultimate Edition (2013)
* The Book of Facts: A Compendium of Interesting and Unusual Facts (2014)
* The Book of Facts: Volume 2 (2015)
* The Book of Facts: Volume 3 (2016)
* The Book of Facts: Volume 4 (2017)