My Sister's Keeper

Not sure how many of you have read the book but although deep it was a wonderful book with an ending you would never see coming. WHY then does the movie industry change the best part of the story. I went to see the movie today while my wonderful husband watched the kids, and instead of leaving the theater greatful that the book had been made into a movie I was and I quote this from myself talking to my husband " overwhelmingly upset, ticked off, and outraged". They completely changed the ending from the book. I mean who does that?!? I don't mean to spoil it for anyone but if you haven't read the book read it and if you have and were planning on going to see the movie don't it'll only make you mad. Alright I'm done with my vent for the day. :)