Biological Physics is a university textbook that focuses on results in molecular motors, self-assembly, and single-molecule manipulation that have revolutionized the field in recent years, and integrates these topics with classic results in statistical physics, biophysical chemistry, and neuroscience. The text also provides foundational material for the emerging fields of nanotechnology and mechanobiology, and has significant overlap with the revised MCAT exam. This inexpensive new edition updates the classic book, particularly the chapter on motors, and incorporates many clarifications and enhancements throughout. Exercises are given at all levels of difficulty.