Act prep

What is the best act prep books?
Ps Does anyone have Kaplan act prep plus?
if so What is the last word in the last question (question 25) at the end of chapter 14?

Depends heavily on the score you’re trying to attain. If you’re shooting for high 30s, Barrons 36 is one of the best books for the high-level scorers. I used Barron’s and practice tests exclusively and I got a 34

The official ACT book (the one with the red cover) the most accurately predicts of your scores since the writers of the ACT made that book. However, use it very sparingly since there are only a few of them. The ACT 5 pound book helped me a lot when it came down to focusing on certain topics.