I agree with him. Relax and enjoy new friends with knowing you are just meeting to get to know her. You’re not going to have sex, she may not be looking for anything more than lunch and book talk. Just because she said she went to a resort doesn’t mean she wants to jump into every person’s bed. You met her because of a book, not a sex site. Don’t overthink things, let her bring up the subject or her vacations stories, don’t push it. If things go further later on you will know if it’s right.
Let me know if you want any advice, I’m always available 😄