I have a hard copy of both the Classical and Quantum books. I highly recommend them as an introduction to concepts assuming you have a bit of background knowled

I have a hard copy of both the Classical and Quantum books. I highly recommend them as an introduction to concepts assuming you have a bit of background knowledge in maths and a willingness to learn (though the notation in the Quantum book is arguably not the best notation to use -- I've not seen wide usage of |u> and |d> as base spin eigenstates). In particular I found the Boolean logic -> Quantum state vectors progression quite interesting, and the emphasis on the history and how you can build formalisms was particularly interesting. Also, it gives you problems (like a "real" textbook) but they are written in such a way that the text is more like a story but you learn the required maths to solve the problems. I loved reading these books while I was in high school, bored with the math-less "physics" we were being taught.