i bought the barron's book for that same reason (plus it was the only book at the store wtf.) and found it to be full of errors and such. i tried doing the full length test in paper format before the CD and found it to be in bad need of editing. the answers in the back didn't match up, and neither did some of the explanation. that book was the worst $18 i've ever spent, and i'm a poor spender 😡
i did test A and B, but after that i didn't even bother with the CD. i read on the reviews that the computer test is also full of errors. only thing good about the barrons is that yes, it is like the real test in terms of format but that's about it.