''Introduction to Population Ecology'' is an accessible and up-to-date textbook covering all aspects of population ecology. This book discusses field and laboratory data to illustrate the fundamental laws of population ecology. It provides an overview of how population theory has developed. It explores single-species population growth and self-limitation; metapopulations; and, a broad range of interspecific interactions including parasite-host, predator-prey, and plant-herbivore. It keeps the mathematics as simple as possible, using a careful step-by-step approach and including graphs and other visual aids to help understanding.