Very good introduction to the mathematical and philosophical foundations of quantum theory for scientists and nonscientists alike. Regrettably, Hughes did not use Dirac's braket notation. Discussion of the various interpretations of quantum mechanics.
Disclosure of Material Connection: Some of the links in the page above are "affiliate links." This means if you click on the link and purchase the item, I will receive an affiliate commission. I am disclosing this in accordance with the Federal Trade Commission's 16 CFR, Part 255: "Guides Concerning the Use of Endorsements and Testimonials in Advertising."