Absolutely love how books with titles like "elementary/basic bla bla bla" or "introduction to bla bla" often turn out to be so freaking hard that they are depressing, they make me feel very intelligent indeed. But this one is exceptionally well-written, although painful as most physics/math books. clears a lot of confusion due to my lack of class attendance in quantum. better than most other texts i'm reading on group theory and applications in physics.