I like this book: The current 2nd edition has in my opinion a nice layout and makes this classic textbook even more attractive. After a well written and concise introduction in the first few chapters (Limits of classical physics to the probability interpretation of the wave function) the book is from my point arranged into two parts: In the first part he gives a standard introduction to all the essential methods and concepts a book on Quantum Mechanics should cover. The style is concise and precise. Therefore Gasiorowicz is able to cover more topics in a given space than the average book on quantum physics. This could be a slight problem for a student who is _completely_ new to the subject or/and has not a good mathematical background. Therefore for a complete beginner and lower undergraduate other books (e.g. “Quantum Mechancis” by Mandl (John Wiley)) might be more suitable. But the book is definitely an excellent good book for someone who wants to refresh his knowledge of quantum mechanics (e.g. before finals). In the second part special emphasis is laid on - the energy levels of the hydrogen atom expected when using just the coulomb potential - the real hydrogen atom - Helium and other atoms - molecules These topics are more emphasized than in most introductory text books! I like this, because it is a good link between (theoretical) quantum mechanics and atomic physics, which are two branches of physics which are extremely closely related but nevertheless there’s a gap between them in many university curriculums. I also read “Principles of Quantum Mechanics” by Shankar, which is also a very good book, but for most students the one by Gasiorowitcz should be more useful: more concise, more homogenious concerning the level (Shankar has some very tough chapters in it), and especially easier to read as a whole before an exam to get a good understanding of quantum mechanics in only a small amount of time.