Could anyone give advice as to what are some good introduction books/textbooks to read. I have been really interested in QM for a while, figure I'd go away from Wikipedia and Lectures. I am a high schooler, so something more suitable for free time would be helpful. I wouldn't mind a little challenge (most math is fine). All I have gotten my hands on was a used copy of the Feynman Lectures and "QM and Path integrals." Thanks a lot.