Hello, new user here.
This thread about the StoryBook font got me curious and went hunting. It is actually exclusive only to Hallmark, made in 1999. I found a book with the font PDMNCN+StoryBookOneMediumPKA. The copyright info in the file says Copyright (c) Hallmark Cards, Inc, 1999.
Still have no idea what the prefix letters are.
However, my hyperfixation to find the font itself led me here:
Hallmark Fonts Info
As you can see, they made a ton of fonts, including the Story Book font. It does not exist as a regular font download. It is only embedded in e-media (e-cards and e-books) and can only be extracted from those.
Just wanted to post this to lay to rest the curiosity of it.