Building a Bigger Europe: European Union and NATO Enlargement in Comparative Perspective (co-author Martin A.Smith), Aldershot: Ashgate, 2000.
Uncertain Europe: Building a New European Security Order? (co-editor Martin A.Smith), London: Routledge, 2001.
Russia and Europe in the Twenty-First Century: An Uneasy Partnership (co-editor Jackie Gower),London: Anthem, 2007 and revised edition in 2009.
The Politics of the New Germany(co-authors Simon Green, Dan Hough and Alister Miskimmon),London: Routledge, 2008.
The European Union, Russia and the Shared Neighbourhood (co-editor Jackie Gower), London: Routledge, 2010.
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