I don't know if anyone else has noticed, but Dover redid their Math and Science section. It's only somewhat aesthetic, but it looks like they're trying to really get it going. Store http://store.doverpublications.com/by-subject-science-and-mathematics.html" They added a "Math and Science Club" which offers a 20% discount on anything in the Math and Science section, although you do sign up to receive a newsletter. I got the first one, but only skimmed it as I've been busy, so I'm not sure if it's worth reading yet. Here's the online link to the newsletter. http://www.doverpublications.com/mathsci/0516/a/" I already have a few of their books, but got them from either half.com, amazon, or local bookstores. The discount makes it pretty comparable. FYI- I went through the proper channels and have no affiliation with Dover other than being a customer.