A chapter book or chapterbook is a story book intended for intermediate readers, generally age 7–10. Unlike picture books for beginning readers, a chapter book tells the story primarily through prose rather than pictures. Unlike books for advanced readers, chapter books contain plentiful illustrations.

What means chapter book?

: a book for young children in which the text is divided into chapters.

What's the difference between a chapter book and a novel?

Chapter books focus on the external events in a story. They often look at important times in children's lives as they are growing up. The characters in chapter books are younger than those in middle-grade novels and story themes in chapter books deal with less complicated subject matters.