While I understand that there are hundreds of different books in which you can study for the SAT/ACT, I was looking to see if there were any particular recommendations out there. Thanks.

I tutor high schoolers on SAT math and use the The Official SAT Guide. It has exams that are most similar to the actual exams as it is published by the makers of the SAT. However, I think that Princeton Review's Cracking the SAT has more effective study and test taking strategies. The key to improving your math score is practice, practice, practice after learning the strategies of the exam. The SAT is primarily a measurement of how well you can take the exam and not an assessment of your academic abilities or intelligence.

SAT is a measure of what you already know. If you aren't good in math, for example, you can practice all you want, but it won't help your score. It is worthwhile to understand the TYPE of questions that get asked (i.e. data sufficiency, for example). Some do score better on the SAT then the ACT, so might also try taking both.

DS used the eKnowledge program. Over the time span of two SAT tests he raised his score 300 points. I was very surprised and happy with the results we saw. Program comes with books as well as computer program. It is also flexible in what you can purchase. Has a military as well as BSA discount(not combined).

True enough, but I have seen plenty of students who are A students in Pre-calculus and still don't do as well as they should on the exam. The SAT has prealgebraic concepts, basic algebra, geometry, and a little trig. Any Pre-calc student has covered all the math needed. However, practice taking the test can significantly help the math score of some students. Absolutely. Some students find the ACT to be more straight forward than the SAT. However, it is much more time constrained. In my experience, many students struggle with the Science section on it because they incorrectly believe the section is assessing science knowledge when it is actually assessing the reading of graphic data, basic reasoning skills and reading comprehension.

This will take some effort but it is one of the best math preps I have ever seen: http://www.khanacademy.org/