Molecular electronics, an emerging research field at the border of physics, chemistry, and material sciences, has attracted great interest in the last decade. To achieve the ultimate goal of designing molecular electronic devices with the desired functionality and experimental manipulation at the single-molecule level, theoretical understanding of electron transport at the nanoscale is an important prerequisite. This book, a multi-authored volume comprising reviews written by leading scientists, discusses recent advances in the field. It emphasizes the need for studies beyond the low-bias...