Final answer:
Endpapers, flyleaf, and frontispiece are parts of the book that fall under the category of design. These elements contribute to the overall aesthetic and visual appeal of the book.
Step-by-step explanation:
Endpapers, flyleaf, and frontispiece are parts of the book that fall under the category of design. Endpapers are the pages that are glued to the inside covers of a book, while the flyleaf is the blank page at the beginning and end of a book. The frontispiece is a decorative illustration or photograph that appears on the verso (left-hand) side of the title page. These elements contribute to the overall aesthetic and visual appeal of the book.