I discovered this website that has Amiga programming reference books for download:
Amiga-BooksI also found a link for quite a few Amiga programming books downloadable in epub and mobi formats as well as in PDFs. I will have to dig up that one, though. I'm not sure which computer and browser I saved it on. As soon as I find it, I will post it.
Anyway, are these sites common knowledge and I have just been in the dark?