Salvete Omnes,
Although this question by Tiberius Diyonisius Draco is rather old I still think others might be also interested in literature on gladiators therefore please find herewith the list I have like that also on my website:
Literature
Bomgardner, David L.
The Story of the Roman Amphitheatre, Routledge, London and New York, 2000.
Coleman, Kathleen.
Missio at Halicarnassos. In: Harvard Studies in Classical Philology, Vol. 100, Harvard University Press, 2000.
Junkelmann, Marcus.
Das Spiel mit dem Tod - So kämpften Roms Gladiatoren. Philipp von Zabern, 2000.
Köhne, Eckart and Cornelia Ewigleben.
Caesaren und Gladiatoren - Die Macht der Unterhaltung im antiken Rom. Philipp von Zabern, 2000.
Meijer, Fik.
Gladiatoren - Das Spiel um Leben und Tod. Patmos Verlag, 2004.
Ministero per i Beni e la Attività Culturali Soprintendenza Archeologica di Roma (Hrsg.).
Sangue e Arena (Brochure of the Special Exhibition at the Colosseum, Rom 2001). Electa, 2001.
Murray, Steven:
Female Gladiators of the Ancient Roman World. In: Journal of Combative Sport, July 2003.
Österreichisches Archäologisches Institut - Grabung Ephesos (Hrsg.).
Tod am Nachmittag - Gladiatoren in Ephesos (Ausstellungskatalog Museum Selçuk), Dogan Gümus, 2002.
Pringle, Heather:
Gladiatrix. In: Discover, Vol. 22, No. 12, December 2001.
Shadrake, Susanna.
The World of the Gladiator. Tempus Publishing Ltd., 2005.
Teyssier, Eric und Brice Lopez.
Gladiateurs - Des Sources à l'Expérimentation. editions errance, 2005.
Wiedemann, Thomas.
Kaiser und Gladiatoren. Wissenschaftliche Buchgesellschaft, 1992.
Wisdom, Stephen. Warrior 39:
Gladiators 100 BC - AD 200. Osprey Publishing, 2001.
Zoll, Amy.
Gladiatrix - The True Story of History's Unknown Woman Warrior. Berkeley Boulevard Books, 2002.
Source:
http://www.ludus-nemesis.eu/en/literatur_en.html
There is some more good literature which I didn't update onto the above list so far:
Brunet, Stephen.
Female and Dwarf Gladiators. In Mouseion XLVIII - Series III, Vol. 4, 2004
Conolly, Peter.
Colosseum - Rome's Arena of Death. BBC Books, 2003.
Futrell, Alison.
Blood in the Arena - The Spectacle of Roman Power. University of Texas Press, 1997
Futrell, Alison.
The Roman Games - A Sourcebook. Blackwell Publishing, 2006.