Part 3 of 3: There is no set page or word count for an appendix, although it should not be excessively extensive. Return to the appendix or appendices and ensure that all of the supplied material is relevant to the text. Avoid including material that is more appropriate for another section of the book. Appendices are useful tools for providing additional information that does not fit into the main body of the text. This could include materials that are not essential for understanding the main story but which reveal more about the author's research or sources of information. Appendices can also include detailed notes taken from interviews, lectures, or discussions. They can even provide evidence for claims made in the text if these are not readily available elsewhere. In general, anything that does not fit into the main flow of the narrative can be placed in an appendix. The length of an appendix depends on its content and purpose. An appendix containing supplementary resources such as bibliographies and glossaries could be several pages long, while an appendix containing only notes would likely be less than a page long. It is recommended that you do not attach files to avoid preventing the book from being published in its entirety. However, if necessary, an exception can be made for important documents that cannot be included in the main manuscript. It is up to the editor what content goes in the appendix and how long it should be.