Uwe Grimm is Professor of Mathematics at the Open University in Milton Keynes, and the former Head of the School of Mathematics and Statistics. His research focuses on the theory of aperiodic order and on mathematical quasicrystals. For full texts of articles, please go to http://arxiv.org/ or follow links from the list of publications http://mcs.open.ac.uk/ugg2/publications.shtml on my personal homepage.