I don’t mean to distribute, but to scan for myself to read digitally, am I allowed to do that legally and ethically when I buy a physical book or would that be totally unethical and illegal?
Ethically you can make as many digital or physical personal copies as you want for yourself outside of perhaps a concern for wasting resources but if you sell them you’re taking away earnings from an author or rights holder or owner which may each have different moral weight. But if you’re caught with hundreds or thousands of copies or copies where they are easily accessible to the public it’s going to appear pretty suspicious.