Kate, keep looking for the book. It is a very good resource for "ripping the veil" from the WTS.
Are you able to access a public library or a university library? It would definitely be available there.
I don't have the money to buy books, either, but I use the public lending systems a lot. Even if some books haven't been available through the libraries, I have had them order the books I want.
The issue is not just about money, though, Kate. It is also about authenticity.
And besides, I totally support Penton's retirement fund. He worked hard for it...really hard and he, and his family, deserve every single penny that is made from the sale of his work. The money gives his work, and him, credibility and value.