Brodie McKenzie has grown up, and she no longer needs her guardian interfering with her plans for marriage and career. The fact that Drew Hammond is nearly always right certainly doesn’t make it any less painful for Brodie when her plans start to go awry.
An “accidental historical” is a book which was contemporary at the time it was written, but the passage of time has turned it into a classic period piece (e.g., before cell phones, Uber, no-smoking laws, and many modern attitudes).