Seconding many here, I used these 10+ years ago in my Calc, Diff Eq, and Linear Algebra classes. Far superior to many of the texts I had to work with. So glad p

Seconding many here, I used these 10+ years ago in my Calc, Diff Eq, and Linear Algebra classes. Far superior to many of the texts I had to work with. So glad people are still getting value out of it. I remember checking a couple years ago expecting it to be taken down for some reason and happy to be wrong.