which book considered as best my friends for rituals of destruction and death of enemies?
Depends what currents you prefer to work with really, different styles work best for different people.
If you’re new in general and don’t know what current works best for you, I add my vote for Baneful Magick by E.A. Koetting, it’s kind of a one stop shop with different techniques and you can pick something that sounds doable for your skills, budget and preferences.