I think I am on to something with the 5th case!!!
The card in the fairytale book has the word "Grues" at the bottom.
check this out :
"GRUE refers to a comically sadistic and grisly little poem of four lines. Coined by Robert Louis Stevenson, the word comes from gruesome. Here's an example of a grue:
Daddy and his tidy spouse
Killed all the kiddies in the house.
Mommy said, when Daddy cried,
"Come on, let's get the ones outside!"
These poems are sometimes called "Little Willies" after the character who appears in many of them:
Willie poisoned father's tea;
Father died in agony.
Mother looked extremely vexed;
"Really, Will," she said, "what next?"
Henry Graham wrote a collection of grues called Ruthless Rhymes for Heartless Homes under the pseudonym Col. D. Streamer. Here are two of his offerings:
Father heard his children scream,
So he threw them in the stream,
Saying as he drowned the third,
"Children should be seen, not
heard!"
Billy, in one of his nice new sashes,
Fell in the fire and was burned to ashes.
Now, although the room grows chilly,
I haven't the heart to poke poor Billy."
link from google search 
Oh, and on the first page where she gets the rejection letter, look at the pages on the right while the rejection letter is open. Just left click and click zoom. There is a letter that is dated a few days before the rejection letter. In it are items that look very familiar!!! 
