Basic reading:

Hofstadter, Richard (1969), The Idea of a Party System: The Rise of Legitimate Opposition in the United States, 1780-1840, Berkeley: University of California Press

Katz, Richard S., and William J. Crotty, eds. 2006. Handbook of party politics. London: SAGE.

Mair, Peter. 2013. Ruling the Void, The Hollowing of Western Democracy. London: Verso.

Mudde, Cas. 2007. Populist radical right parties in Europe. Cambridge: Cambridge University Press.

Muirhead, Russell (2014) The Promise of Party in a Polarized Age, Cambridge MA: Harvard University Press.

Rokkan, Stein, and Seymour Martin Lipset (1967) Party systems and voter alignments: cross-national perspectives, New York: Free Press.

Rosenblum, Nancy (2008), On the Side of the Angels: An Appreciation of Parties and Partisanship, Princeton: PUP

Sartori, Giovanni (1976), Parties and Party Systems, Cambridge: CUP

Schattschneider, Elmer Eric. 2009 [1942]. Party government, American government in action series. New Brunswick: Transaction publishers.

White, Jonathan, and Léa Ypi (2016) The meaning of partisanship, Oxford: Oxford University Press.