I used Starting Points with ER when he was a high school senior, and I plan to use it again for EK next year for her senior year. ER read all of the books you listed except Never Before in History (we skipped that section of the book). Also, we had already read the Narnia books, so we discussed them briefly, but we didn't reread them. ER graduated from college last month, and I just now asked him his opinion on these books. He said he only vaguely remembers Know What You Believe, Assumptions, Answers for Difficult Days, and How to Read Slowly, but he LOVED Mere Christianity (so did I) and he also really liked The Deadliest Monster, paired with Frankenstein and Jekyll and Hyde. He said that he thinks all Christians should read these books.