When he grows up, Caleb Green wants to be an astronaut and a Ninja Turtle, but for now, he's content spending his time reading, reading, reading. The 4-year-old from Chicago set a huge goal for himself last Saturday — to read 100 books in one day. His father, Sylus Green, told ABC7 Chicago that at first he tried to talk his son down to a lower, more manageable number, but Caleb was adamant: He wanted to read 100 books.