Chapter books are a type of children's literature designed for early readers, typically aged 6 to 9 years. They are longer than picture books and are divided into chapters, making them easier to read in smaller sections. These books often feature illustrations, but they focus more on text, helping children develop their reading skills and comprehension. The stories in chapter books usually have simple plots and relatable characters, often exploring themes of friendship, adventure, and personal growth. Popular examples of chapter books include series like Magic Tree House and Junie B. Jones, which engage young readers and encourage a love for reading.