While I own multiple books on quantum theory that handle the subject at a more advanced level with deeper mathematical rigor, I cannot fault this book for being what it is for its target audience.<br><br>This is THE book on quantum mechanics that deservedly sets a benchmark for which all other undergraduate quantum theory textbooks shall compare. It essentially starts off with Schrodinger's equation, but then the way it derives the fundamental theorems of quantum theory is unbelievably done well for the level this book is intended for, whether it be the normalization condition, the "ladder of states" for the harmonic oscillator, hermitian operators, Dirac notation, the canonical commutation relation, general uncertainty principle (from which comes the Heisenberg uncertainty principle), or the Pauli exclusion principle.<br><br>It then follows this by expressing the applications of perturbation theory, WKB approximation, scattering, atomic theory for hydrogen and helium, as well as further analysis within quantum dynamics.<br><br>The book finishes with a nice overview of linear algebra as needed for this level of quantum theory.<br><br>I should add that this book is also, in general, a good book for those interested in the applications of Fourier analysis, as much of this book covers Fourier integrals, as native to the properties of the wavefunction. It is not a coincidence that the derivation of the uncertainty principle comes right after a fairly extensive coverage of quantum Fourier analysis from the statistical interpretation of position-space and momentum-space relations.