Pull The Book Out Revealing a Secret Place

You notice a book titled [insert book that no one would read] and decide to take it off the shelf.

To your surprise, it's attached to a thin rope which opens a secret passage way as you pull on the book which causes books and dust to fly all over causing Kate to cough. You see books which appear to form a wall change into a tunnel.

Inside the book, is a map of the passage, and the rope detaches from the book.

"Wow!" Kate exclaims

"You realize that the book's actually in a different jacket. The real cover of the book looks like some kind of map"

"Let's see where the map leads!" Kate exclaims excitedly

"I don't know. It looks dangerous" you caution

"We just have to be careful" Kate rebuttals "We have a map to show us the dangers anyway"