Here is a quick summary of what is new about The Official Beginner’s Guide for ACT 2020-2021 1st Edition that was released in February 2020.
PreACT Diagnostic Test: The guide provides online access to one full length PreACT diagnostic test that can be used by 9th to 12th graders(highly recommended for 10th graders) to predict student performance on the ACT test. This PreACT diagnostic test was originally administered as PreACT Form 16A in October of 2016.
ACT Practice Test (Form 20MC7): The guide contains one full length ACT practice test and this test is identical to the 2018 April ACT Test Form A09. The book also provides access to this same test in an online format.
My recommendation is to not buy this guide, and instead practice with the two original official tests that are included in this guide: PreACT Form 16A and 2018 April ACT Test Form A09.