The two-volume work by Ruark and Urey, Atoms, Molecules, and Quanta (1930, 1964) is an excellent reference work on quantum physics originally published in the early days of quantum mechanics. The first volume covers spectroscopy, the old quantum theory, x-rays; the second volume starts with critical potentials and scattering, then develops wave and matrix mechanics along historical lines before entering into the general theory of quantum mechanics and spectra of molecules. It's a favorite of mine for its connection with the history of quantum mechanics and its experimental foundations. It will not, of course, have more recent results (or anything beyond roughly 1930).