The sixth volume of this handbook provides an overview of the research on the country-based experience of bioethanol fuels at large, Chinese, US, and European experience of bioethanol fuels, production of bioethanol fuel-based biohydrogen fuels for fuel cells, bioethanol fuel cells, and bioethanol fuel-based biochemicals with a collection of 17 chapters. Thus, it complements the fifth volume of this handbook. Hence, the sixth volume indicates that the research on the evaluation and utilization of bioethanol fuels has intensified in recent years to become a major part of the bioenergy and biofuels research together primarily with biodiesel, biohydrogen, and biogas research as a sustainable alternative to crude oil-based gasoline and petrodiesel fuels as well as natural gas and syngas. This book is intended for students, researchers, engineers, policy makers, economist, business managers, and social scientists, working on the production, utilization and evaluation of bioethanol fuels.