Carnarvon, Fiona (2009): , Highclere Enterprises LPP, . Carnarvon, Fiona (2007): , Highclere Enterprises LPP. Cross, William (2016): , Book Midden Publishing, ISBN 978-1905914-36-). Cross, William (2012): , Book Midden Publishing, ISBN 978-1-905914-05-0. Cross, William (2011): , 3. utg., ISBN 978-1-905914-08-1. Cross, William (2013): , Book Midden Publishing, ISBN 978-1905914-25-8. James, Thomas Garnet Henry (2006): 2. oppl., London/ New York: Taurus Parke Paperbacks, ISBN 978-1-84511-258-5.