The International Symposium on Molecular Spectroscopy is the premier annual meeting in this exciting and interdisciplinary field. The symposium uniquely combines plenary talks from world leaders in the field with parallel sessions comprising shorter talks, many presented by graduate students, and fosters a collegial and collaborative atmosphere with a multitude of formal and informal interactions. Registration and housing costs are kept low to enable entire research groups to attend, and in fact most senior people in the field gave their very first conference presentation at this symposium (to a very friendly audience). A wide range of topics is covered, from theory to experiment, from gas-phase to condensed-phase, from low resolution to ultra-high resolution, from the microwave to the ultraviolet, and from fundamental science to applications such as astronomy and atmospheric science. Each year's meeting also includes three "mini-symposia" on topics of special interest. Access to "An array of scarlet and grey booklets: 65 years of the Symposium on Molecular Spectroscopy" written by Brenda P. Winnewisser has been generously provided by Elsevier (You may also link to the external article here).