Often in a story about a magical book, the book can transport people to different worlds. Maybe it's a world full of magic and mystery where strange rules apply. People have to learn to adapt and use the magic within the world to find their way back or to achieve a certain goal. It could also be a world where time moves differently, and the main character has to figure out how to deal with that. Also, the magical book might be able to talk and give advice to the person who owns it, guiding them through difficult situations.
A magical book story could involve the book having the power to bring fictional characters to life. So, a child reading the book might see their favorite storybook characters suddenly appear in front of them. These characters could then take the child on an adventure, either within the world of the book or in the real world. And the book might also have the ability to change its content depending on the reader's thoughts or needs, constantly providing new and exciting stories.