Funny enough, I never heard of it until yesterday when I was looking to buy a book called "Calculus Made Easy" from Amazon and read a review that mentioned not

Funny enough, I never heard of it until yesterday when I was looking to buy a book called "Calculus Made Easy" from Amazon and read a review that mentioned not to buy the book because it was a printed version of the it on Project Gutenberg. I was debating if I should post up the link or not because I did find other posts that mentioned Project Gutenberg on HN when I did a quick search; however, I didn't see any post that mentioned Project Gutenberg exclusively in my search. I figured if HN didn't think it was useful then they'll just bury my post down or leave it alone. Also, I'm sure there were other people on HN out there like me who were completely oblivious that this project existed. I'm glad I did mention because some of the comments on this post are really good.