A book is composed of several parts, including spines, CHAPTERS, PAGES, indices, and indexes. The spine is the outermost part of a book, usually made of cardboard, and it is where the title and author's name are printed. CHAPTERS are divisions of a book that are usually numbered and titled. PAGES are the individual sheets of paper that make up the book. Indices and indexes are both lists of topics and page numbers that are found at the end of a book.