Nancy Goldstone. The Lady Queen: The Notorious Reign of Joanna I, Queen of Naples, Jerusalem, and Sicily. Walker Books, 2009.
Nancy Goldstone. Four Queens: The Provençal Sisters Who Ruled Europe. Penguin, 2007.
Elizabeth Casteen. "Sex and Politics in Naples: The Regnant Queenship of Johanna I of Naples, 1343 – 1382." Journal of the Historical Society 11 (June 2011): 183–210.
Welbore St. Clair Baddeley. Queen Joanna I of Naples, Sicily, and Jerusalem, Countess of Provence, Forcalquier, and Piedmont: An Essay on Her Times. London: William Heinemann, 1893. *Note: Like all good 19th-century antiquarians, St. Clair Baddeley was in possession of two things: a fabulous name and very firm opinions. His biography makes for delightful reading but isn't terribly objective or academically rigorous.*
(archive.org page) (PDF)
Angevin Family Tree