This book has been developed over many years from several popular courses taught to students at both Birmingham and London universities. It provides an important step in introducing principles and concepts within the field of toxicology. The underlying mechanisms of toxicity are highlighted through examples taken from gases, minerals, plants, fungi, bacteria, marine creatures, industrial chemicals and pharmacological agents. In this second edition, the text has been completely revised and expanded with the addition of six new chapters carbon monoxide, hydrofluoric acid, lead, mushroom, toxins, paracetamol, paraquat and diquat. Each chapter is self-sufficient, enabling readers to dip into chapters of interest at random without any lack of understanding. The book is informative, with numerous clinical details, and will appeal to those who wish to delve into this fascinating subject.