Status Updates From Starling Nights

I'm not sure about this book. The more I read, the more I feel nothing is really happening. At first, there was mystery and intrigue. I had high hopes for it.
Now I'm just finding it really slow, and nothing is being revealed. I'll keep going in the hope I get a sliver of information as I'm finding it tough.

Oh wow, this book!
It just keeps getting stranger.
Well, when I say stranger, the behaviours of the starlings just keep getting stranger!
I just can't put my finger on who or what they are!
I just know they're dangerous, intriguing, and have become Mabel's dark obsession!