Best ACT prep books?

I’m a sophomore and I’ll be taking the ACT in June. I already have Barron’s ACT 36, and I plan on getting the ACT red book. What else could I use to prep?

hi! also a sophomore here but taking the test in september. i bought the two you mentioned, PR 1296 and a general book, the black book, the undergroung guide and a deck of barron flashcards. I know, its a lot but i have time. I would say to get flashcards for when you aren’t at home and then as many books as possible. while i haven’t read through them all yet, the underground guide looks very manageable and almost fun. feel free to message me