> I wanted to learn calculus from this very well-recommended book, but it costs $50, so I got this reprint of an older textbook for $15 To be fair, the textboo

> I wanted to learn calculus from this very well-recommended book, but it costs $50, so I got this reprint of an older textbook for $15 To be fair, the textbook industry is like a mafia scam, releasing new books in complicity with University courses that then "require" the new edition. In many cases, the $15 second hand book is just fine.