This book starts with the most elementary ideas of molecular orbital theory and leads the reader to an understanding of the electronic structure, geometry and reactivity of transition metal complexes. The pedagogical aim is to give the student a theoretical method of analysis which relies on some simple ideas (symmetry and overlap), applicable to problems of varying complexity. ...this book is a very good supplement to the author's previous textbook on the orbitals of organic molecules. It will easily reach the pedagogical aim of giving the student a theoretical method of analysis that relies on some simple ideas. Angewandte Chemie, 2005, 117, 7325-7326.