[oneiftwo]

This is a fantastic resource. I've long lamented the difficulty of finding textbooks. Since colleges buy them back every semester to control demand, it's actually hard to find something that should be cheap and common. It's tragic.

Good to see they're at least here online, though it's also shameful that I didn't find this on Google when I searched for it a year or so ago. Tried to buy a calculus textbook to teach a friend - only overpriced latest editions by and large were available.