You could google search the book title, and you'll probably find the link to a PDF if the first page of results.
I would say to buy it, because it's not expensive and hard copies are better than digital ones. In the US, I could get a used copy delivered to my door for $4. I am not sure if it's the same in the Ukraine. So, I am not going to judge you.
I won't link to the pdf directly. I feel like that would violate the rules of this forum.