Suggest any Writing book for me?

I’m going to retake and actually ‘‘prepare’’ for the SAT later this year… I already have the following books:

1.Maths: PWN The SAT
2.Reading:500 Essential Words
3.And Blue Book for practice.

But can anyone suggest me any writing book because i im not good enough at it. also are the above books enough?
I Got 2270 SAT in my first attempt without any practice.

http://www.amazon.com/2nd-Edition-Ultimate-Guide-Grammar/dp/1492353299
This is a great book.