A thoughtful, accessible look at the rapidly growing issue of invasive plants, animals, and microbes around the globe with a focus on the scientific issues and ecological, health, and other challenges. From an award-winning adventure and science journalist comes an eye-opening exploration of a burgeoning environmental phenomenon and the science coalescing around it. Leslie Anthony leads readers on adventures physical and philosophical as he explores how and why invasive species are hijacking ecosystems around the globe. Weaving science, travel, history, and humor with diverse examples to chart and describe the phases of species invasion and human response, Anthony introduces field researchers and managers who seek to understand the biological, social, and economic aspects of this complex issue, and whose work collectively suggests the emergence of a global shadow economy centered on invasives. With tales of pythons in the Everglades, Asian carp and lamprey in the Great Lakes, Japanese knotweed seemingly everywhere, and the invasive organisms we don't see--pathogens and microbes such as the Zika virus--this book rivets attention on a new ecological reality.