sir,i want to become a ethical hacker.can i prepare for hacking from today,if yes then what type of books i should to learn.

Yes you can, You can get online and or you can take a course

Its good that you want to be an ethical hacker. There are many workshops and courses available under different banners. You can search online for the various books available for the same.
But we do not provide expertise on this topic. Sorry for the inconvenience.