I'm wondering if anyone here might know were I could download a free quantum mechanics textbook. So far I havn't had much luck looking for one has the few ones I found were too hard. Websites I find that discuss QM are ethier too short and don't go into much detail, or their too advanced. I'm looking for something that's introductory but covers a lot. I'm familiar with calculus up to curl and divergance and I'm starting to learn some matrix math. Does anyone know of some QM textbooks on the web?