The comprehensive guide to the 2026–2027 ACT test—including 4 genuine, full-length practice tests. The Official ACT® Prep Guide 2026–2027 book includes four authentic ACT tests—all of which contain the optional writing test—so you get maximum practice before your test date. This guide provides clear explanations for every answer straight from the makers of the ACT to help you improve your understanding of each subject. You’ll also get: Practical tips and strategies for boosting your score on the English, math, reading, science, and (optional) writing testsFour new practice tests that reflect the Enhanced ACT experienceExpert advice on how to mentally and physically prepare for your test This edition has been updated with four new practice tests, writing samples, and prompts, so you can be sure your materials will set you up for success on your ACT test. Through the Official Guide, you’ll learn what to expect on test day, understand the types of questions you will encounter when taking the ACT, and adopt test-taking strategies that are right for you.