I like this text - reminds me of "the complete idiot's guide to calculus" which I used as a companion to my Calc textbook (Stewart) when learning. Not sure I would have faired as well without it.
It gives a great and sometimes humorous understanding, which formed a nice framework when I moved on to Vector Calc, Differential Equations, etc later on. At that point in your math career, you can't (or shouldn't try to) rely on mindless algorithms/processes to solve problems like you may have in high school. You've got to understand what you're doing.
Ps, I doubt many on HN really needed to hear that, but it may be a useful note for somebody.
Fresh book recommendations delivered straight to your inbox every Thursday.