I've both read and analyzed 5 Zegarelli books for the tutorial developers at classpros dot com, who are meticulous about who they "let" into their select group of authors. Zegarelli is a genious not just in math, but in his approach to teaching. For each problem area, he gives (as in all his books) verbal, formula, picture and common sense descriptions of what's going on.
If you only had one book to study before this demanding exam, this is the one! Test prep advice aside, Mark really shines when it comes to giving examples of how to remember what's going on, regardless of your learning style or modality. If you hate all the formulas and symbols of math, don't despair-- Zegarelli in typical fashion takes the time both to show how to solve each problem type and describe it in real life terms.
Take a concept (luckily not on this exam!) like the partial derivative in his Calculus II For Dummies. Most scientists can't really describe "verbally" what it is. Mark tells you to imagine that you're standing on a hill. The slope of the hill is obviously the first derivative, as you look up the hill. BUT-- what if you want the slope at other places, like the side of the hill, between the side and the top, etc? That's where partials come in-- they add vectors to the picture-- DIRECTION as well as location and slope. As the SAT book explains, a vector happens when you have TWO parameters-- like location and direction, vs. just location.
In addition to the SAT, this is a GREAT refresher on math even if you're only trying to get back into it for fun, your job, or retraining for new skills or retirement. Mark doesn't just give a bunch of solutions like the Schauum folks, he also explains WHY he solved it the way he did. I usually give stars mostly for content; in this case, it's as much for the author and his teaching competence as the book, title, subject, etc.