age appropriate

I was watching the fox channel "outnumbered" show. they were talking about the book
"the fault in our stars" . the discussion was whether the book to be taken out from middle school libraries. the reason being it is too morbid for young readers.
I agree that children should not be reading about mortality .  i was 8 to 9 year old when i read a tragic story of a mother and child dying of hunger. that story made me feel so sad for a very long time, and i started to make alternate ending(a happy one),
where someone rushes to them with a big vessel of food. but still i knew how the story ended in the book and it was haunting me for few months. even now i can not forget it.

p.s. i found that book in the children section of the local library.