This is by Graham Oppy. He and Edward Feser, a Cahtholic philosopher / philosophy professor, recent had two online discussions on theology. YouTube links on Feser's site:

* https://edwardfeser.blogspot.com/2019/07/debate-with-graham-...

* https://edwardfeser.blogspot.com/2020/02/discussion-with-gra...

There's a lot of 'bad atheism' out there: folks who attack straw man arguments and get basic things wrong (most of the "New Atheists" fall into this camp). Oppy does not seem to be one of those.

Another good site is "History for Atheists": someone who goes after his fellow atheists for "the misuse of history and the use of biased, erroneous or distorted pseudo history by anti-theistic atheists":

* https://HistoryForAtheists.com

Atheists can be crackpots as much as theists can be.

Here you go: https://b-ok.cc/book/5260524/55d50b . Z-lib (above) and Libgen are usually my go-to if I'm not sure I want to (or can't) purchase a book.

is this legal?

No. But not all illegal things are immoral.

Limiting the acquisition of knowledge to people with sufficient economic means is immoral, because it means that more than half the worlds population has no means to move forward, even if they are motivated and intelligent.

Though discussing Sci-Hub and scientific articles, much of this argument applies as well to textbooks and publishing generally:

What the academic publishing industry calls "theft" the world calls "research": Why Sci-Hub is so popular

https://old.reddit.com/r/dredmorbius/comments/4p2rwk/what_th...