Best ACT prep book for Science and Math?

I finished the Barron's ACT prep book, but I'm not satisfied with my scores yet. My Math and Science scores need the most help. Which prep book should I use for more practice in those subjects?

For Math practice, I would recommend either The Ultimate Guide to the Math ACT or McGraw Hill's Top 50 Skills for Math. These books will walk you through every different type of math problem you might encounter on the ACT and explain in depth how to find the solutions.

It's a little harder to find prep books that cover the Science section specifically, but there are a few online review guides that might help you. You should check out this ultimate study guide for ACT Science. If you're really looking for a book, McGraw Hill's Top 50 Skills for English, Reading, and Science is a good book that includes the Science section in its prep strategies.