You can buy SAT prep books at B&N (or other bookstores). Don't wear him out on it, though. Your kids will take the SAT lots of times probably before they are done... D15 has taken the SAT twice (7th & 8th grade through a talent search). Took PSAT this year (10th grade, her school has them take the PSAT as "practice). She will take the PSAT again in 11th grade. Then she will take the SAT at least once (maybe twice) for "real" for college admission. That is a total of 7 times. I have been careful not to push SAT prep on her... until this next summer, when she is coming up on the PSAT "for real" for NMSF. I think we have paced her pretty well, but she could have burned out early.

We had her take one full practice test before taking the SAT in 7th and 8th (each time) from a prep book. That was all we did (and she rocked it, top 3 finish in one category for the talent search in our region).