Heiner Schenke:
Heiner Schenke was born in Hanover and is a native speaker of German. He has taught German at university level for many years and is Director of the Institution-wide language programme at the University of Westminster. He is also the co-author of the Willkommen! course as well as several Teach Yourself books.

Paul Coggle:
Paul Coggle has taught German at all levels, from school to postgraduate, both in Britain and the USA.