Where's My Review Book

I was trying to get the right book for my review and so I wrote praxis. Colorado department of education introduced praxis to me. They said I could ask praxis for more information about the book. Since am foreign I submitted my school documents to IERF so I have a US equivalent and quality to take my said licence. I asked praxis if they could guide me for the right test. Unfortunately they replied that it is my responsibility to find more information and the accurate license for me. Sound unhelpful to me, I will not ask if I know right? Anyhow perhaps I need more research about it and buy the right book for my review.