For a good general introduction to these concepts, and a brief history of the Open Source Movement read  "Introduction"  in Chris DiBona, Sam Ockman and Mark Stone (eds) Open Sources: Voices From the Open Source Revolution, Sebastopol (CA): O'Reilly and Associates, Inc..  In addition to this, you can read The Free Software Story (a collection of articles from Salon 21st Century) and Software Returns to Its' Source (a collection of articles in the March 1999 edition of PC Magazine) for further information about the Open Source Movement.