They usually block via DNS, so it's pretty easy to circumvent by using alternative DNS servers such as 1.1.1.1 or 9.9.9.9, or Tor (which you sometimes need for

They usually block via DNS, so it's pretty easy to circumvent by using alternative DNS servers such as 1.1.1.1 or 9.9.9.9, or Tor (which you sometimes need for books that have been DMCA'd)