225. Mark Leslie: Book rating system G, PG, R, X equivalents

This week's guest is a longtime friend, Mark Leslie (Lefevbre) who I have had on as a guest a few times already discussing his Canadian Werewolf series, which I really enjoy! I've never discussed book ratings and what makes something children vs YA vs Christian vs all the other categories. How sex and violence are handled in the different categories. And what is the equivalent of a Motion Picture Rating System for books to let an audience know what they are getting? I've not addressed this in any of my past interviews. I will also do some research into different categories of romance vs erotica. Also what target audiences/ages would an author write for to reach the different audiences?