I am one of those pathetic cases who should have been a math major, but could not stay awake during the freshman pre-calc lectures conducted by bored and boring grad students. Now, nearly 40 years later I am determined to self-educate my way through calculus.
At first I took a crack at the Wiley "Precalculus A Self Teaching Guide". Holy cripes, what a disaster! Unnerving to find such an improbable number of errors, especially for student picking up after decades of non-study.
Then, I grabbed Rhonda Huettenmeuller's fine work, and am doing the practice at the end of chapter four. I actually remembered some of my advanced algebra and managed to work my way through the problems.
Well written and clear, she provides enough dimensions on problems to give you insight, then gives you room enough to have to think a bit. The answers are all provided, and are *correct*. Well, at least we agree, so that is certainly a good sign.
I especially appreciate how she teaches this from the perspective of tackling calculus as the next step, pointing out issues that particularly apply, and how, to more advanced mathematics.
Now, if we can just get her to write more books...