Dr. Robert R. Crichton is an Emeritus Professor, Faculty of Science, Universite Catholique de Louvain in the new town of Louvain-la-Neuve, Belgium, where he taught biochemistry to students of chemistry, biology and veterinary medicine and directed the Biochemistry Unit. He has published over two hundred scientific articles and since 1985 has organized over twenty Advanced Courses on Metals in Biology in Louvain-la-Neuve, training over 1300 doctoral and post-doctoral students, many of whom are today leaders in this field. The Second and Third Editions of Biological Inorganic Chemistry: An Introduction to Molecular Structure and Function received the 2013 and 2019 TEXTY Textbook Excellence Awards in Physical Sciences respectively from the Text and Academic Authors Association.