Terry Mahoney is an astronomer at the IAC’s Scientific Editorial Service, where he works as a scientific editor revising and formatting research articles for the astronomical press. He is Astronomy Adviser to the Oxford English Dictionary and a member of the editorial staff of the Astronomical Society of the Pacific Conference Series. His main research is in galactic structure, but he has a keen interest in the history of astronomy, chairing the IAU Johannes Kepler Working Group and co-chairing the International Year of Astronomy 2009 Kepler Task Group. He is a member of the Astronomy Communication Journal Working Group and a fellow of the Royal Astronomical Society.

• List of Maps.- Foreword.- Preface to the Series.- Preface to Volume I, Part I.- Acknowledgements.- How to Use this Gazetteer.- Pronunciation Guide.- Abbreviations Used in the Gazetteer.- Mercury: An Overview.- Glossary of Terms Used in the Gazetteer.-Gazetteer of Mercury.- Classified Index of Surface Features on Mercury.- Atlas of Mercury.- Appendix 1: IAU Mercury Nomenclature.- Appendix 2: Key to Transcriptions of Non-roman Alphabets.- Appendix 3: Mercury Data.- Appendix 4: Mercury Transits.- Appendix 5: Mercury Timeline.- Bibliography.

From the book reviews: "This book provides a great deal of information about the surface features of the planet. ... Summing Up: Recommended. Lower-division undergraduates and above; general readers." (J. R. Kraus, Choice, Vol. 52 (2), October, 2014) "Mercury begins with information as to how to use the Gazetteer, explaining the way in which entries have been made, and a guide to pronunciation. ... this new Gazetteer of Mercury is very comprehensive and represents a really excellent publication. I strongly recommend it." (Richard McKim, The Observatory, Vol. 134 (1242), October, 2014)