The formalism is not developed logically, and, overall, the book is very weak in formalism.
The author takes the shut-up-and-calculate approach to the extreme (like how standard freshman physics textbooks present QM). This is not helped by the fact that the book shies away from the math of QM: linear algebra and the concise Dirac notation, which is introduced but quickly discarded. The bad: While a step by step calculation makes it easy to follow, one often gets lost in details and misses the big picture. For example, Griffiths takes his time to explain standard deviations, separation of variables, and phase and group velocity in the beginning. Update (05/15/16): tl dr: I would give this book more stars if it is titled "Introduction to Wave Mechanics."įirst, the good: this book doesn't require mastery of "advanced" classical physics and math such as Lagrangian and Hamiltonian mechanics, electromagnetism, partial differential equations, linear algebra, or statistics.
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