* *The Psychology of Political Leadership*. Routledge, 2018.
* *The Politics of Electoral Reform*. Routledge, 2008.
* *The Political Impact of British Devolution*. Routledge, 2004.
* *(with R. J. Johnston and G. C. Smith) The British Election of 1997*. Dartmouth, 1998.
* *(with E. L. McLean and G. C. Smith) The British Election of 1979*. Croom Helm, 1980.
Articles and Chapters in Books
* "Leadership and the Psychology of Political Action." In *The Oxford Handbook of Political Psychology*. Edited by John T. Jost, James H. Kuklinski, and Thomas E. Epper. Oxford University Press, 2022.
* "British Electoral Reform: Progress and Prospects." In *The Palgrave Handbook of Electoral Reform*. Edited by Stephen M. Fisher, Thomas T. Mackie, and William M. Mishler. Palgrave Macmillan, 2022.
* "Devolution and British Politics: Looking Forward and Looking Back." In *The Oxford Handbook of British Politics*. Edited by Mark Garnett, Richard Kelly, and Philip Lynch. Oxford University Press, 2021.
* "The First Past the Post System and the British Electoral System." In *The International Encyclopedia of Electoral Systems*. Edited by Richard S. Katz. Sage, 2020.
* "The British General Election of 2019." In *The Palgrave Handbook of the 2019 UK General Election*. Edited by Anand Menon and John Curtice. Palgrave Macmillan, 2020.
*And so on...*