Does anyone have any good suggestions for a QM book at the advanced undergrad level? I am interested in particular about the QM formulation using density matrices as states and POVM's as measurements. I am an engineering student, so my math background isn't too strong beyond the basic linear algebra/calculus 1-2-3 courses. No analysis or abstract algebra or anything like that, so I would actually like a QM book that can also explain the math, kind of like Shankar... except Shankar doesn't even cover PVM's as I recall (I might be wrong though). Thanks in advance for any suggestions!