Witchcraft is a broad term, do you know what kind of magic most you're interested in, because thats a good place to start looking.
Like the person before mentioned there are lots of pdf files online that you can use, where I'm from books on these kind of things are very rare to find and very very expensive, and more expensive if you ship it from over seas, so I've relied on pdfs or ebooks.
When you say your country does not believe in magic, do you mean its still outlawed? Or else I'm sure if you looked hard you might find some books, or maybe if you went to second hand shops, book exchanges or garage sales you may just find a little mine of knowledge. Or else internet will be your best friend but take everything you read with a pinch of salt.
There are also some very good articles on this site for beginners and people starting a new craft, most of them are for free and open to the public. They're are articles about basic skills that every practitioner of these crafts should learn eg. meditation, visualisation, energy cleansing etc.
If you know what you're interested in let us know and maybe we can recommend some articles or send links to pdfs and ebooks for you.
If you need help don't be afraid to ask. : )