Gwen needs you to rub the Book Of Prophecy on the Totem Pole. Go inside of the Crystalline Caverns Infected Zone, on the ground floor is the totem go to the totem and click on it. Gwen then instructs you to rub the spine of the Book of Prophecy on the Totem. When you do the spine of the book disappears! Gwen then wants you to return to her immediately. Gwen believes that this means that you have been imbued with the power from the Book of Prophecy which means that you might be able to activate the Totems without the Book.