Grades 9—12. Richard H. Langley and John T. Moore. 2018. 432 pages. Prepare and build test confidence for the AP® Chemistry Exam with this easy-to-follow study guide. Updated for the latest exam changes, 5 Steps to a 5: AP* Chemistry is by far the best AP® Chemistry prep book available. Includes access to an online prep course. Practice in the format you need, whether print, online, or mobile. Soft cover.