If you need a (original notes, not the pirated book), comment below or check out official NCERT and government sources.
Your UPSC preparation is a marathon—don't sabotage it with a risky download. Invest in the authentic book (or borrow legally) and study with peace of mind. If you have found a Google Drive link claiming to be the 8th edition, report it to the publisher (McGraw Hill India). Help protect authors' rights and fellow aspirants from scams.
I understand you're looking for an article related to the search term (where quebrado likely means "broken" in Portuguese/Spanish, or refers to a cracked/unofficial file).