This book is an eminently readable introduction to the structure of transition metal chemistry. By virtue of its non-mathematical and strongly visual approach to bonding, it provides a most accessible text on the varied nature of the valence shell in d-block chemistry. Topics covered include the stability and reactivity of transition metals in their various oxidation states; spectroscopic and magnetic properties and their implications for chemical bonding in the transition metal series; the changing roles of d electrons with respect to oxidation state.