10 Best ACT Prep Books 2026 in the United States

The ACT Total Prep by Kaplan is a comprehensive study guide designed for high school juniors and seniors preparing for the ACT. With over 1000 pages, it offers thorough content coverage across all ACT subjects, which helps build a strong foundation in English, Math, Reading, Science, and Writing. One of its strengths is the inclusion of multiple practice tests that simulate the real exam, giving students a valuable chance to practice timing and question styles. The book also contains detailed answer explanations, which are useful for understanding mistakes and learning effectively.

Kaplan is known for solid test-taking strategies, and this guide includes helpful tips to improve pacing and question approaches, which can boost confidence on test day. The book’s large size and weight might be a bit overwhelming for some, and while it is packed with information, it may require a good amount of time and dedication to work through fully.

This guide is well suited for students who want an all-in-one resource with practice and strategies, especially those who prefer a book that covers everything in one place rather than using multiple separate materials.

The Barron's ACT Study Guide Premium for 2026 is a thorough resource designed for high school students preparing for the ACT, especially those in grades 10 through 12. It offers extensive content coverage across all ACT subject areas through a hefty 700+ page guide, which means you get a deep dive into the material. One of its standout features is the inclusion of 6 full-length practice tests, which are great for getting comfortable with the actual test format and timing. These practice tests come with detailed answer explanations that help you understand mistakes and improve effectively.

The guide also provides useful test-taking strategies that can boost your confidence and efficiency on test day. While the difficulty level is set to mirror the real ACT, it might feel challenging for beginners without some prior study, but it’s ideal for serious prep. Another plus is the online practice component, offering extra flexibility and chances to practice beyond the book. On the downside, the book is quite large and heavy, which might make it less convenient for carrying around. Also, since there’s no detailed list of supplemental resources included beyond the online practice, some students might want additional materials for topics needing extra help.

This guide is well suited for students seeking a comprehensive, all-in-one ACT prep tool with plenty of practice opportunities.

The Princeton Review Enhanced ACT Premium Prep for 2026 is designed to support high school students (grades 10-12) preparing for the ACT exam. It offers thorough content coverage across all sections of the test, helping learners review key subjects effectively. A major strength is the inclusion of 6 full-length practice tests, which are valuable for familiarizing yourself with the exam format and timing. The book also provides clear answer explanations, which help you understand your mistakes and learn from them. Additionally, it includes test-taking strategies aimed at improving efficiency and confidence during the exam.

The difficulty level is well-matched to actual ACT standards, meaning the practice tests and questions are realistic without being too easy or too hard. While the book is comprehensive, some users might find the large size and density of information a bit overwhelming if they prefer shorter or more concise guides. The prep book serves as a solid choice for students seeking an in-depth study resource combined with extensive practice opportunities and strategic advice to boost ACT performance.