When we enter the world of venom, we enter the realm of one of the most diverse, versatile, sophisticated and deadly biological adaptations ever to have evolved on Earth. Since it first appeared in ancient jellyfish and sea anemones, venom has proved so effective that it has since evolved independently in dozens of different animal groups. The authors reveal the many unique methods by which venomous animals deliver their cocktail of toxins and how these disrupt the physiology of the victims. Jenner and Undheim also consider how humans have learnt to neutralise venom's devastating effects, as well as exploit the power of venom in innovative ways to create new drugs to treat a variety of serious conditions. Fully illustrated throughout, this illuminating guide will appeal to all those with an interest in the wondrous world of venom.