Used study guide. I did highlight throughout and some practice quizzes are already marked. It has 10 question quizzes at the end of each chapter and a 50 question practice quiz over the whole book. The answers and rationale are provided at the end of the book. I took the exam and passed on the first try. I took the course in 2023 and then bought the study guide in December of 2024, so it was fairly thorough since I barely remember the course material.