Surface-Enhanced Raman Spectroscopy: a Brief Perspective.- Electromagnetic Mechanism of SERS.- Electromagnetic Theory of SERS.- Coupled Plasmonic Plasmon/Photonic Resonance Effects in SERS.- Estimating SERS Properties of Silver-Particle Aggregates through Generalized Mie Theory.- Studying SERS from Metal Nanoparticles and Nanoparticles Aggregates with Continuum Models.- SERS From Transition Metals and Excited by Ultraviolet Light.- Electronic Mechanisms of SERS.- Two-Photon Excited Surface-Enhanced Raman Scattering.- Applications of the Enhancement of Resonance Raman Scattering and Fluorescence by Strongly Coupled Metallic Nanostructures.- Tip-Enhanced Raman Spectroscopy (TERS).- Tip-Enhanced Near-Field Raman Scattering: Fundamentals and New Aspects for Molecular Nanoanalysis/Identification.- Single-Molecule SERS Spectroscopy.- Temporal Fluctuations in Single-Molecule SERS Spectra.- Single-Molecule Surface-Enhanced Resonance Raman Spectroscopy of the Enhanced Green Fluorescent Protein EGFP.- Surface-Enhanced Vibrational Spectroelectrochemistry: Electric-Field Effects on Redox and Redox-Coupled Processes of Heme Proteins.- Nanosensors Based on SERS for Applications in Living Cells.- Biomolecule Sensing with Adaptive Plasmonic Nanostructures.- Glucose Sensing with Surface-Enhanced Raman Spectroscopy.- Quantitative Surface-Enhanced Resonance Raman Spectroscopy for Analysis.- Rapid Analysis of Microbiological Systems Using SERS.- Surface-Enhanced Raman Scattering for Biomedical Diagnostics and Molecular Imaging.- Ultrasensitive Immunoassays Based on Surface-Enhanced Raman Scattering by Immunogold Labels.- Detecting Chemical Agents and Their Hydrolysis Products in Water.