I cannot say that this is a strict quantum mechanics text that would be used for a quantum physics course, for the absence of core idea like operator mechanics, ladder operators and the such. Yet "Molecular Quantum Mechanics" definitely shines and has proven itself to be a much better (in details, explanations, readability) text than "Physical Chemistry" written by the same author. "Molecular Quantum Mechanics" focuses on aspects of quantum mechanics in chemistry, especially in applications on spectroscopy (infrared and Raman) which roots in the ideas of rotation, vibration, anharmonicity, and centrifugal distortion. It also discusses advanced topics like nonlinear spectroscopy and computational chemistry. The book is written in thorough details and a very organized manner. I recommend "Molecular Quantum Mechanics" along with McQuarrie's "Physical Chemistry: Molecular Appraoch" for anyone who would like to learn about quantum chemistry.