Googlearchy: How a Few Heavily-Linked Sites Dominate Politics on the Web. Matthew Hindman, Kostas Tsioutsiouliklis, Judy A. Johnson (2003)
Topical interests and the mitigation of search engine bias. S. Fortunato, A. Flammini, F. Menczer, A. Vespignani (2006)
In Google we trust: Users' decisions on rank, position, and relevance. Pan, B., Hembrooke, H., Joachims, T., Lorigo, L., Gay, G., and Granka, L. (2007). Journal of Computer-Mediated Communication, 12(3), article 3.
The Myth of Digital Democracy. Matthew Hindman (2009)

The Googlization of Everything. How One Company is Disrupting Culture, Commerce, and Community… and Why we Should Worry (a book in progress by Siva Vaidhyanathan

Ken Auletta (2010) Google - O fim do mundo como o conhecemos. Porto: Civilização Editora
John Battelle (2006) The Search. Como o Google mudou as regras do negócio e revolucionou a cultura. Casa das Letras.
Jeff Jarvis (2010) O que faria o Google?, Lisboa: GestãoPlus.
Steven Levy (2011) In the Plex - How Google thinks, works, and shape our lives. Simon & Schuster.

Fred Vogelstein (2009) Keyword: Monopoly. http://www.wired.com/images/press/pdf/googlopoly.pdf