Bubu,
Just another thought. If you are looking for an excellent book on writing, may I suggest the following two books:
1) Style: Toward Clarity and Grace by Joseph M. Williams. You can find it on Amazon
here. (http://tinyurl.com/62rn6)
2) Style: Ten Lessons in Clarity and Grace by Joseph M. Williams. You can find it on Amazon
here. (http://tinyurl.com/6qzyd)
As you can see, these books are highly rated on Amazon.
I need to reread these books myself.
The books are NOT grammar books. Instead, they teach you to write more effective sentences. They provide guidance on how to structure the sentences so that they flow better from one sentence to the next.
I just thought this might be of interest to you.