For almost 200 years spectroscopy has been one of the primary methods to probe the properties and dynamics of atoms and molecules. Despite its long history, it continues to be one of the most vigorous and active disciplines in the physical sciences. In recent years a number of technological and methodological advances have opened up new exciting areas of study. Examples include biomolecules in the gas and condensed phases, molecules in extreme environments such as ultracold gases, metrology using frequency combs, THz spectroscopy and probes of fast molecular and electronic dynamics using femtosecond and attosecond laser sources. The impressive progress in the experimental domain has been going hand in hand with the advancement of theoretical methods to compute molecular structure, properties and spectra with increasing accuracy in ever larger systems. This new volume will provide a forum to discuss cutting-edge developments and future challenges in molecular spectroscopy. The topics addressed at the meeting include biomolecules in the gas and condensed phases, high and ultrahigh-resolution spectroscopy, studies of molecular dynamics in the time and frequency domain and progress in computational methods.