The best ACT prep book out there. Authors: Mike and Patrick Barrett
I also have 2 ACT Official Prep Guides. The 2024-25 isn't the one the Black Book refers back to, but you can use it for practice tests. The 2019-2020 Official Prep Guide pairs with the Black Book.
Black book is in almost new to excellent condition.
(The 2019 and 2024 Guides have writing in it, but you can find the tests online.)
$10 takes all. (You are paying for the Black Book; the 2 Guides will accompany the Black Book for free to their new home.)
Locally, the ACT test is given in Auburn off of Bell Rd.