Greetings, Landon!
I'd suggest you get the Enthuwares for both OCA and OCP. They're pretty cheap and they have an explanation for each and every question. Use the OCA ones to see if you missed anything important (weak topics etc), and you can check them out a bit more before moving on. Then, to get better scores on the OCP, prepare from the OCP Enthuwares as well as the great and mighty study guide!
For myself, I have only used these two materials for OCA and the two complete each other perfectly. You get the ideas and concepts from the book, but I really needed the practice the Enthu tests ahve given me. It cleared which areas I'm struggling on, and enforced others. I can only recommend it!
Best regards, Dóri