To those who haven't read the book and don't want to be spoiled, I would suggest not continueing to read my post. Therefore, I will leave a bit of space.
AGDee, I'm responding to your comment (not in a bad way

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So let me guess instead of making Anna die in a car accident at the end of the book, they go through the whole rig-a-morale of a trial to just have Anna donate the stupid kidney to Kate in the first place?
What is it with screenwriters always trying to turn books into "happy endings"? Seriously, why can't they just leave the book the way it is.
Maybe it's just me, but I've written stories (and posted a few on another website) and I'd be annoyed if a screenwriter changed the plot of my story. Don't get me wrong, I understand a couple of minor changes here and there to carry the plot on, but if I have written a story where the main character dies, I don't want to see them alive at the end of the script because that isn't what I wrote. Does that make sense?