Entering a writing contest, Casey pens a story that is so scary it gives her goosebumps and is astonished when her story's main character, a gum-chewing slime monster, comes to life and targets the Ghostwriter team
Going through the shelves to see what I can get rid of.
I vaguely remember that this was a TV show, and presumably I must have watched it apparently liked it enough to get one of the tie-in books. I don't really remember it or anything about it, though. I have no memory of reading this book, either. Obviously it didn't make a huge impression.
Skimming through... It's seems to be written well enough (grammatically, at least). The text about the characters is interspersed throughout with the story that is being written by the main character.