The following books set the foundation for or support the case for deliberative direct democracy at the federal level. This is by no means an exhaustive list. There are many, many books about democracy which we have not had a chance to evaluate.
Becker, T., & Slaton, C. D. (2000). The Future of Teledemocracy. Praeger Paperback.
Cronin, T. E. (1989). Direct democracy: The politics of initiative, referendum, and recall. Harvard University Press.
Ellis, R. (2002). Democratic Delusions: The Initiative Process in America. University Press of Kansas.
Gastil, J., Levine, P. (Eds.). (2005). The deliberative democracy handbook. John Wiley & Sons, Inc.
Gerber, E. R. (1999). The Populist Paradox. Princeton University Press.
Hirschhorn, J. S. (2006). Delusional democracy: Fixing the republic without overthrowing the government. Common Courage Press.
Kaufmann, B., & Waters, M. D. (2004). Direct democracy in Europe: A comprehensive reference guide to the initiative and referendum process in Europe. Carolina Academic Press. ISBN 0-89089-262-8
Mansbridge, J. (1999). “On the Idea that Participation Makes Better Citizens.” In Stephen L. Elkin and Karol Edward Soltan, eds., Citizen Competence and Democratic Institutions. University Park: Penn. State University Press.
Waters, M. D. (2003). Initiative and Referendum Almanac. Carolina Academic Press.