Generally my typical books have lots of twists and turns a big surprise ending and then usually another surprise at the end and ideally, as in Garden of Beasts, we get to the very end and we find at the last few pages that there's yet another surprise.
I'm a happy-go-lucky character. I'm not that miserable. But I can never let anyone into my world.
Divide each difficulty into as many parts as is feasible and necessary to resolve it.