When Noor became a princess

Nour is a girl who loves everything related to princesses, that's why she sneaks into her mother's room and takes the princesses' story without her knowledge. And when you try to open the story, the story will not open, but its pages will be tightly applied. Nour will try again to open the story after knowing the only condition that the story will ask of her. What is this condition? What will Nour do to achieve this condition? Will Nour be able to actually open the story?