University Books

I always wonder how University books cost so much. I know there is a lot of R&D that goes into them but still, 150 bucks for a book, really! In subjects like first and second year calculus why do those books need to be updated every two years. It's not like they are finding new methods to do integrals and derivitives. Whatever the case it really doesn't matter too much It was more that I just wanted to type something into my first weblog. ME