The Complete Guide to ACT English, Fifth Edition, and The Complete Guide to ACT Reading, Third Edition, are now available from Amazon.
The books are now aligned with the enhanced ACT and the 2025-2026 Official Guide.
Please note: While there are some minor content updates in both guides, and in the case of the ACT Reading book, a (short) new chapter, the majority of the edits were fairly superficial. As a result, there is no major disadvantage to using the current versions–if you are studying from the current books already, you do not need to purchase new ones.
You should, however, make sure to take practice tests from either the 2025-26 guide or the official “Preparing for the ACT” booklet in order to familiarize yourself with the timing and style of the updated exam.