This is the final book in a series of three texts that together provide a modern, comprehensive and authoritative account of our present knowledge of the stars. Completely self-contained, it discusses the internal structure and the evolution of stars. In a clear and readable style, the author emphasizes the fundamental physics governing stellar structure and the ideas on which our understanding of stellar structure is based, and provides a thorough discussion of stellar evolution. Careful comparison is made between theory and observation, and the result is a lucid and balanced introductory book.