I've consistently earned near-perfect scores on the Math and Science sections of the ACT, but my English and Reading scores are significantly lower (by ten points or so!). Which prep books should I use to improve my scores on the English and Reading sections?
I would recommend The Complete Guide to ACT English and The Complete Guide to ACT Reading, both by Erica Melzer. These books contain helpful strategies along with high-quality, accurate practice materials that will prepare you well for the real test. For more information on the best ACT prep books, read this article: http://blog.prepscholar.com/best-act-prep-books-2015.