I think reading could help, but just doing practice exams and learning all of the preparation material in the pretext of the book should suffice. Once you get your initial score on a practice test, analyze your results and your scores will improve. I swear. It's like the SAT.
On the testeven though I didn't do as well I was doing on the practice exams, I still improved drastically.
Initial SAT score (first take): 1640 (480 Verbal, 540 Writing, 620 Math)
Second SAT score: 1790 (550 Verbal, 580 Writing, 660 Math)
Then I started prepping a lot more:
Went through most of my SAT blue books, but didn't analyze too well, read RocketReview too, and did 4 practice PSAT... average was 2000-2100.
Third SAT score: 1940 (550 Verbal - chocked on vocab <- avg. was 650, 660 writing <- avg was 700+, 730 Math <- averag was the same)