I feel like the editor's have really been falling down on the job here. In one place, the author references a character from a recent Harry Potter film. Let's not forget that our protagonists are from the 60s, not the 2010s. There's also a point where she seems to get the character's last name wrong. According to references, Jocasta takes Duncan's name (Innes), but at least once he's referred to as Duncan Cameron?