Often times in fiction, bookshelves hide a Secret Path. Often times you have to find a book to put in an empty slot in order for it to move. Other times you have to push the darn thing in order to get behind it.
Five hats means that five tropers think it is ready to publish.
You are saying that you think this draft is ready to be published. That means the description is not ambiguous,
it doesn't duplicate an existing trope, there are at least three examples, and the title makes sense.