Battelle, John. The Search. City: Portfolio Hardcover, 2005.
Krug, Steve. Don't Make Me Think : a Common Sense Approach to Web Usability. City: New Riders Press, 2005.
Morville, Peter. Ambient Findability. Sebastopol: O'Reilly Media, Inc, 2005.
Rosenfeld, Louis and Peter Morville. Information Architecture for the World Wide Web. Sebastopol: O'Reilly, 2002.