The picture book, "Julius, The Baby of the World," is an animal fantasy story about a family of mice.  Told as a third person narrative, it details the life of a little girl named Lilly and her hatred for her new born brother Julius.  The story follows a chronological time line like most picture books for children and the plot simply reveals the theme that the author and illustrator, Kevin Henkes, is trying to express.  Throughout the story Lilly is fighting for the attention of her parents and is constantly being punished for bad behavior.  The book ends with LIlly defending her baby brother when he is made fun of by another mouse.  In the end Lilly learns to appreciate and love her family.  The book is for younger children ranging from preschool to second grade levels.  The illustrations are engaging for this age group with vibrant colors and strong correlation between text and images.  It is also a subject area that children may find applicable to their family lives if they have a younger sibling.