I'm going to go with the middle grade mystery I just started tonight this week, and that would be Big Game by Stuart Gibbs.
This is the third in his FunJungle series which is set at a zoo/amusement park in Texas. Think San Diego Wild Animal Park with some roller coasters (not that we see much outside the animals since they are always the focus of the mysteries).
So with that in mind, here's the opening:
I was helping walk the elephants when we all heard the rifle go off.
And jumping to page 56, we find:
"I was thinking, it's kind of weird that two crimes happened here this morning, so maybe they're connected somehow."
Marge screwed up her face, trying to make sense of this. "What do you mean?"
"Maybe someone broke into the candy store to create a diversion from the fact that they were shooting at the rhino," I said. "Or maybe they shot at the rhino to divert everyone from the candy store."
I'm always a third of the way in, and loving this book. Not that I'm surprised since I really do enjoy all of Stuart's books.