Biology of Methylotrophs introduces the reader to the study of methylotrophs - microorganisms that use reduced one-carbon compounds for growth. The book is divided into five parts. Part I covers the taxonomy, morphology, and ultrastructure of methylotrophic bacteria. Part II discusses the processes involved in their growth and metabolism. Part III talks about the possible applications of methylotrophs and their enzymes in industrial fields as well as chemistry. Part IV deals with the molecular genetics and the gene expression of methylotrophs, and Part V deals with their habitat and role in the environment. The text is recommended for microbiologists who would like to be acquainted with the subject or make further studies about methylotrophs.