Jasmin Blanchette is a Trolltech senior software engineer and is writing his M.Sc. thesis in computer science at the University of Oslo.
Mark Summerfield works as an independent trainer and consultant specializing in C++, Qt, Python, and PyQt, and is the author of Rapid GUI Programming with Python and Qt. Blanchette and Summerfield coauthored C++ GUI Programming with Qt 3 and the first edition of C++ GUI Programming with Qt 4.