So, on a recommendation, I picked up a copy of Barbara Bleau's Forgotten Calculus, to brush up on the subject in advance of starting business school this fall.
Only, I haven't forgotten calculus. No, my problem is, I never learned it in the first place.
So if anyone knows of a book called "Calculus You Never Learned In The First Place," please let me know.
 I guess you could say I'm a bit behind the curve.