Amazon drives me absolutely nuts. I clicked on the link for Polya's 'How to Solve It' and it took me to a page with a $69.99 paperback and a link to a $10 e-textbook. I click the textbook link and now the paperback link is to an identical looking $16.45 book, the only difference I can tell is that it is the "reprint" edition (aren't they all reprints given the original was published in 1945?). The reviews and most information other than weight and size are the same. Which do I choose? Will I regret not having whatever was worth $53.54 in the original link. There doesn't seem to be anyway to know if I am buying some fly-by-night poorly printed edition for $16.45 or getting a good deal because they all seem to be the same product. I've seen so much garbage on Amazon lately, I just don't trust anything, not even the books.