The Golden compass

In this book there is a girl who is in another world much like ours. We have souls, they have souls too but they walk at their side, souls they call Demons.

Laura is the main character and her demon is pan (they can shapeshift to differnet animals)

She and her friend roger who is in trouble with the gypies (game) she runs with him to the collage and the gypies are scared to go in. So she makes a deal with billy (friend from the gypies).

The deal was if billy where to try on a rope of the collage (she lied it would melt you if you wore it) then she would hand over roger.