Reddit reviews Quantum Mechanics, Vol. 1

As an addition:

While Griffith's book on quantum mechanics is fantastic, I really enjoyed Claude Cohen-Tannoudji's book: https://www.amazon.com/Quantum-Mechanics-Vol-Claude-Cohen-Tannoudji/dp/047116433X/

If you have the mathematical foundation, you will find it a very thorough introduction to quantum mechanics.

The typical introductory quantum mechanics book is probably Griffiths, but if you already have an introductory grasp of basic quantum physics, linear algebra, and calculus, I instead recommend,

Quantum Mechanics Vol 1, Claude Cohen-Tannoudji

My own quantum mechanics education has been sparse and poorly taught, but I have seen a lot of the quantum mechanics books and can say that Cohen-Tannoudji has a two-volume set which is second to none:

https://www.amazon.com/Quantum-Mechanics-Vol-Claude-Cohen-Tannoudji/dp/047116433X

If you aren't specifically reading Sakurai for course preparation, I emphatically recommend this approach instead. It starts from axioms and derives things in an understandable way.

sprichst du von echten Fachbüchern oder von allgemeinverständlicher Literatur?

Fachbücher: String theorie: barton Zwiebach
https://www.amazon.de/First-Course-String-Theory/dp/0521880327

QM: Cohen Tannoudji
https://www.amazon.de/Quantum-Mechanics-Vol-Claude-Cohen-Tannoudji/dp/047116433X/ref=sr_1_1?s=books-intl-de&ie=UTF8&qid=1465804024&sr=1-1&keywords=cohen+tannoudji