The Golden compass – Philip Pullman 

«WE BETTER RESCUE HIM, PANTALAIMON." LYRA HAS SPENT HER LIFE RUNNING WILD ACROSS THE ROOFTOPS OF JORDAN COLLEGE WITH HER BEST FRIEND, ROGER, NEARLY ALWAYS BY HER SIDE. BUT NOW ROGER HAS DISAPPEARED, AND LYRA AND HER DAMON, PAN, SUSPECT THAT HE MAY HAVE BEEN STOLEN BY GOBBLERS-CHILD• SNATCHERS WHO TAKE THEIR PREY NORTH TO DO UNSPEAKABLE THINGS:

BUT LYRA WILL BRAVE IT ALL-ARMORED BEARS, POWERFUL WITCH CLANS, AND A MYSTERIOUS SUBSTANCE CALLED DUST-AND PAN WILL TAKE THE FORM OF A LION, A FALCON, A WOLVERINE, WHATEVER IT TAKES TO GET ROGER BACK. WHAT LYRA DOESN'T KNOW, MUSTN'T KNOW, IS THAT HER ACTIONS WILL HAVE CONSEQUENCES NOT JUST IN HER WORLD, BUT IN ALL THE WORLDS BEYOND.