Looking at the lists, I see that many of the suggested textbooks cost more than $200, and several cost more than $300. Authors and editors should be paid for their work, but textbook prices at these levels will discourage independent study by students not provided textbooks by their schools.
Fundamentals of Physics (2013) by Halliday, Resnick, and Walker costs $150 used on Amazon, while the 2004 edition costs $14 used. I assume that either version could be used to prepare for the AP Physics C exam. It would helpful if the College Board or someone else verified the suitability of older editions of textbooks for AP exams and courses.
