There are many ACT prep sites which are FREE. I have a few books in my office which you may check out.
The following are some links to prep sites:
www.act.org/content/act/en/products-and-services/the-act/test-preparation.html
www.march2success.com/
uniontestprep.com/act
www.sparknotes.com/testprep/books/act/
blog.prepscholar.com/complete-official-act-practice-tests-free-links
The following are some links to prep sites:
www.act.org/content/act/en/products-and-services/the-act/test-preparation.html
www.march2success.com/
uniontestprep.com/act
www.sparknotes.com/testprep/books/act/
blog.prepscholar.com/complete-official-act-practice-tests-free-links