This six-volume handbook aims to provide a representative sample of the research on both the production and utilization of bioethanol fuels. The book presents three primary research streams of bioethanol fuel production, feedstock-based bioethanol fuel production, and utilization of bioethanol fuels with two volumes each. The first two volumes of the Handbook of Bioethanol Fuels: Production and Utilization, present research on bioethanol fuel production focusing on the production processes of biomass pretreatment, biomass hydrolysis, hydrolysate fermentation, biomass metabolic engineering, and other production processes such as biorefinery-based bioethanol production, heat and power cogeneration, and bioethanol separation. The first volume also includes sections on the introduction to bioethanol fuels and introduction to bioethanol production processes. The third and fourth volumes present research on feedstock-based bioethanol production focusing on waste-based bioethanol production, lignocellulosic bioethanol production, starch-based bioethanol production, sugar-based bioethanol production, and algal bioethanol production. The third volume also includes a section on the introduction to feedstock-based bioethanol production. The last two volumes present research on the utilization of bioethanol fuels focusing on the use of bioethanol fuels in diesel and gasoline engines, evaluation of bioethanol fuels, use of bioethanol fuels for biohydrogen production, use of bioethanol fuels in fuel cells for bioelectricity generation, and bioethanol-based biochemical production. The fifth volume includes further a section on the introduction to the utilization of bioethanol fuels whilst the last volume includes further sections on the bioethanol sensing and nanotechnology applications in bioethanol utilization. This comprehensive handbook set is intended for researchers, engineers, biotechnicians, biochemist and chemical engineers working on the clean energy production and utilization of bioethanol fuels.