Bruce Rogers taught ESL and test preparation courses at the Economics Institute at the University of Colorado, USA, since 1979. He has also taught in special programs in Indonesia, Vietnam, Korea, the Czech Republic, and Egypt. In addition to this series, he is the author of Introductory Guide to the TOEIC Test and The Complete Guide to TOEIC Test, both with National Geographic Learning. Nick Kenny is a freelance testing consultant and trainer living and working in Cambridge. He has worked on language testing projects in various countries in Europe and South America and is an established EFL author, specialising in preparation and practice materials for the University of Cambridge examinations.