This contemporary book covers significant new knowledge that has emerged during the last two decades and, thus, provides novel antibody phylogenetic perspectives relevant to development of new antibody-based therapeutics and vaccines. It fills a much-needed niche in the area of immunoglobulin genetics across species from a comparative perspective. New insights and perspectives from immunoglobulin genetics from species such as sea lamprey, cattle, marsupial, bat, rat, rabbit, and swine—other species than the traditional subjects of mice and humans—are relevant to antibody design and engineering. These new perspectives find direct application in the cutting-edge areas of antibody design, engineering and therapeutics, antibody-drug conjugates, and novel antibody-based vaccines. This book fills the need to provide updated knowledge of this newly exploded area that is finding applications in new drug development. No other competing books on the topic are available in the market. The book will be of great interest to immunologists, immunology researchers, immunogeneticists, researchers in pharmaceutical science, those involved in the infectious disease and antibody therapeutics areas, and many others.