Michael Arnold is an evolutionary biologist with over 100 scientific articles to his credit. He is best known for the work produced by his group on the evolutionary role of natural hybridization - particularly relating to the plant group known as the Louisiana Irises. However, he has collaborated on evolutionary biology research projects involving organisms as diverse as primates, bats, Columbines, fruit flies and fungi. He has published two other books - Natural Hybridization and Evolution (OUP, 1997) and Evolution Through Genetic Exchange (OUP, 2006). Mike is also a published outdoor writer whose stories and photographs have appeared in such places as Safari Magazine. Mike and his wife Frances have two adult children, Brian and Jenny.