<p>^Uh I bought it at Amazon (used one) when the book was cheap.
Anyhow, not having a RR won’t matter that much. It only helped me on Grammar, the stuff that everyone can be good at with a bit of practice. I think the CR is difficult for most CC’ers, no? Grammatix is fantastic for CR and Writing, by the way. I benefited a lot from its strategies; however, Grammatix does not do a good job in Math. Partly because math cannot be “cracked” by test-takers. IMHO Math DOES require years of practice + solid schoolwork.</p>