The context of the following conversation is Tracy was reading the book and got her attention. Tracy knew what might happen in the end.:
Tracy says I am totally obsessed with this book..
The friend responds Oh yeah, I have read that before..
Tracy responds Isn't it amazing?.
The friend responds Yeah, and the cliff hangers are insane..
Tracy responds I already kind of know what is going to happen at the end..
The friend responds Oh, so you read spoilers?.