In a new series in plant conservation sponsored by the World Wide Fund for Nature (WWF), this book is a practical guide to a subject of increasing concern to the conservation biologist. As with each of the books in the series, this book aims to give an authoritative guide to the subject in a clear, jargon-free style. It should therefore not only be of interest to the academic biologist interested in the phenomenon of invasion, but also to government and non-governmental personnel involved in the decision-making process needed as a result of the problems encountered with invasive species. Case-studies highlight specific problems from a wide range of countries, including North America, South and Central America, Africa, Australasia, South and South East Asia, Europe, the Pacific and Atlantic Islands and Indonesia. The book contains an appendix with a list of invasive species and their countries of origin. A bibliography contains reference to all cited articles and books. This book should be of interest to conservation biologists, economic botanists, ethnobotanists, plant ecologists, agriculturalists, those interested in development problems, geographers, environmental scientists, ecotourists and "green" lay people.