As an aspirant, your goal is to clear the exam, not to collect files. The tiny amount of money you save by downloading a pirated 8th edition PDF could cost you a year of your life preparing again.
A: No. The publisher (McGraw Hill) does not release official free PDFs. Any Google Drive link claiming to be the "latest" is either fake, a virus, or the 8th edition renamed. As an aspirant, your goal is to clear
If you are desperate and absolutely cannot afford the book, and you are only in the first week of your preparation to understand basic concepts (like Federalism or Fundamental Rights), you might use the 8th edition PDF temporarily. As an aspirant