Common terms:
* Appendix: This is the most common term for a separate section at the end of a book that provides additional information, such as data, charts, glossaries, or bibliographies.
* Addendum: This term usually refers to a section added to a book after it has been published, often to provide updates or corrections.
* Supplement: This is a general term that can refer to any additional material added to a book, including appendices, addenda, or separate booklets.
* Insert: This refers to a separate piece of paper or booklet that is included within the main body of the book.
* Fold-out: This refers to a large sheet of paper that is folded and included within the book, often used for maps, diagrams, or other illustrations.
* Looseleaf: This term is used for sections of a book that are designed to be removed or replaced, often used for reference books or workbooks.
* Companion book: This term refers to a separate book that complements the main book, often providing more detailed information or supplementary material.
Other terms:
* Handbook: A book that provides practical information or guidance on a particular topic.
* Manual: A book that provides instructions or guidelines for using a particular product or system.
* Glossary: A list of terms and their definitions.
* Bibliography: A list of books, articles, and other sources that were used in the book.
* Index: A list of topics and the pages where they are discussed.
Ultimately, the term used for a book supplement will depend on the specific content and purpose of the supplement.