Book format refers to the specific dimensions, layout, binding style, and overall presentation of a book. It encompasses various aspects such as hardcover versus paperback, the size of the pages, and the arrangement of text and illustrations. For children's books, the format significantly impacts the reading experience, as different formats may cater to different age groups. For instance, board books are designed for infants and toddlers, while picture books are suited for preschoolers and early readers. The choice of format can enhance engagement and support literacy development.