If you read Italian, here's a book for you:
An edited collection of essays on machinima featuring a variety of contributions on topics ranging from art to performance, appropriation and subversions. This is part of the ongoing Ludologica books series.
Ttitle: Machinima! Teorie. Pratiche. Dialoghi.
Edited by: Matteo Bittanti & Henry Lowood.
Publisher: Edizioni Unicopli
Book Series: Ludologica. Game Theory
Volume: 21
Pages: 288
Release Date: April 18 2013
Price: 19 Euro
Language: Italian
Contributors: Matteo Bittanti, Matteo Bonvicino, Alessandro Cavaleri, Marque Cornblatt, Frank R. Dellario, Joshua Diltz, Jun Faklenstein, Douglas Gayeton, Friedrich Kirschner, Kate Fosk, Kari Kraus, Mathias Jansson, Robert Jones, Clint Hackleman, Hugh Hancock, Tracy Harwood, Paul Marino, Mizuko Ito, Henry Lowood, Mark Methenitis, Michael Nitsche, Paolo Pedercini, Ilaria Ravarino, Dan O'Reilly Rowe, Valerio Sillari, and Eddo Stern.
Related articles:
Chris Marker e il machinima (08/08/2012, Italian)
Il machinima tra evoluzione e rivoluzione (07/12/2012, Italian)
La Game Art di Eddo Stern (11/27/2012, Italian)