1 Introduction.- 2 Electromagnetic Radiation.- 3 Light Sources with General Application.- 4 Spectral Analysis of Light.- 5 Detection of Electromagnetic Radiation.- 6 The Dielectric Function.- 7 Spectroscopy in the Visible and Near-Visible Spectral Range.- 8 Symmetry and Selection Rules.- 9 Light-Scattering Spectroscopy.- 10 Infrared Spectroscopy.- 11 Magnetic Resonance Spectroscopy.- 12 Ultraviolet and X-Ray Spectroscopy.- 13 Spectroscopy with ? Rays.- 14 Generalized Dielectric Function.- 15 Spectroscopy with Electrons.- 16 Spectroscopy with Positrons and Muons.- 17 Neutron Scattering.- 18 Spectroscopy with Atoms and Ions.- A To Chapter 1, Introduction.- B To Chapter 2, Electromagnetic Radiation.- C To Chapter 3, Light Sources with General Application.- D To Chapter 4, Spectral Analysis of Light.- E To Chapter 6, The Dielectric Function.- F To Chapter 7, Spectroscopy in the Visible and Near-Visible Spectral Range.- G To Chapter 8, Symmetry and Selection Rules.- H To Chapter 9, Light-Scattering Spectroscopy.- I To Chapter 10, Infrared Spectroscopy.- J To Chapter 11, Magnetic Resonance Spectroscopy.- K To Chapter 13, Spectroscopy with ? Rays.- L To Chapter 14, Generalized Dielectric Function.- M To Chapter 17, Neutron Scattering.- References.