Preface. I: Introduction. The Theory of Sunspots, J.H. Thomas, N.O. Weiss. II: Setting the Scene. Starspots, P.B. Byrne. The Evolution of Sunspots, C. Zwaan. III: Overall Structure of Sunspots. Continuum Observations and Empirical Models of the Thermal Structure of Sunspots, P. Maltby. Observations of the Mesoscale Magnetic Structure of Sunspots, A. Skumanich. Magnetohydrostatic Equilibrium in Sunspot Models, K. Jahn. The Fate of the Heat Flux Blocked by Spots, H.C. Spruit. IV: Fine Structure of Sunspots. Fine Structure of Umbrae and Penumbrae, R. Muller. High Resolution Observations of the Magnetic and Velocity Fields of Simple Sunspots, A.M. Title, Z.A. Frank, R.A. Shine T.D. Tarbell, K.P. Topka, G.B. Scharmer, W. Schmidt. Magnetoconvection, M.R.E. Proctor. The Cluster Model of Sunspots, A.R. Choudhuri. V: Waves and Oscillations in Sunspots. Sunspot Oscillations: Observations and Implications, B.W. Lites. Magnetohydrodynamic Waves in Structured Magnetic Fields, B. Roberts. Theory of Umbral Oscillations and Penumbral Waves, S.M. Chitre. Sunspot Seismology: The Interaction of a Sunspot with Solar p-Modes, T.J. Bogdan. VI: The Relation of Sunspots to the Global Solar Magnetic Field. The Formation of Flux Tubes at the Base of the Convection Zone, D.W. Hughes. The Motion of Magnetic Flux Tubes in the Convection Zone and the Subsurface Origin of Active Regions, F. Moreno-Insertis. VII: Concluding Summary. The Sunspot Phenomenon: A Commentary, E.N. Parker. Index.