And Rob Helpychalk has a good idea about not buying into their hype with a quick review of some open source books.
I used Hurley this year for both logic and critical thinking courses, which was convenient. But just about all the texts out there are good enough for my purposes, so I doubt that I'll assign such an expensive text again anytime soon.
My local paper ran an article last month about the out-of-control prices on college textbooks and a New York Times editorial calls on Congress to intervene. Apparently the NYPIRG recently released a report about this problem.