The Mysterious book

Twenty years old,Julittte Martin , a French girl belongs to a common family. Her father Jules Martin was a psychologist and her mother Bella Martin was a teacher. She was very curious because of her curiousity she wants to become a lawyer but her parents were against with her decision. One day, She found a book  The book was looking very creepy, the title of the book was looking like someone traced his black marker upon the heading of the book but Juliette likes that book and buys it. she found that the book's pages become wrinkled and had such unwanted picturesbut question remains who pasted these pictures in that book? Is it a child who pasted these pictures in the book or someone else? And what's the purpose to paste these pictures.