These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Alternative Character Interpretation: Again Heather. Is she really just a spiteful, manipulative brat or is she an emotionally damaged girl desperate for the attention and approval of her family and peers. Sammy can't seem to figure her out.
Sammy can be viewed as either a plucky amateur sleuth, or a nosy girl who causes trouble for all her friends.
Growing the Beard: The series was good to begin with, but as time has gone on, the books have combined episodic mystery with arc-based character drama, thoroughly averting Status Quo Is God.
Nightmare Fuel: Sammy Keyes and the Hollywood Mummy. And in Dead Giveaway, it turns out that the abusive husband has been dead for a while, and his wife has been posing as him and hiding his body in her compost pile.
Stoic Woobie: Good Lord, Holly. Her parents are dead, she's lived in eight abusive foster homes, and when Sammy finds her, she's living in a cardboard refrigerator box down by the river.
Toy Ship: Sammy/Casey. Marissa/Danny is not a Beta Couple, since they have roughly the same amount of trouble getting together.