Bunker (Steacie Institute for Molecular Sciences) and Hensen (Bergische University Wuppertal) explain the role symmetry plays in the solution of problems in spectroscopy and molecular orbital theory. Their graduate textbook focuses on the relationship between the geometrical symmetry of a molecule, as expressed using the point group symmetry of it equilibrium structure, and the true symmetry of a molecule, as expressed using the molecular symmetry group.