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Mark Summerfield graduated in computer science with first class honors from the University of Wales Swansea. He followed this with a years postgraduate research before going into industry. He spent many years working as a software engineer for a variety of firms before joining Trolltech. He spent almost three years as Trolltechs documentation manager, during which he founded and edited Trolltechs technical journal, Qt Quarterly. Mark is the coauthor of C++ GUI Programming with Qt 3 and C++ GUI Programming with Qt 4, and author of Rapid GUI Programming with Python and Qt: The Definitive Guide to PyQt Programming. Mark owns Qtrac Ltd., www.qtrac.eu, where he works as an independent author, editor, trainer, and consultant, specializing in C++, Qt, Python, and PyQt.