The colophon appears at the very end of the book. It gives information about the printing and publishing process. It might mention the type of paper, ink or binding used to create the book.
The section Note on the Type could be included in this section or separately. It gives information about the font/typeface used in the book, possibly mentioning its characteristics and history.
Most self-published books do not have a colophon or a page dedicated to the typeface. However, they are worth some consideration. I’m sure you’ve read at least one book where the font changes from one chapter to another. That’s an example of an author (or editor) who did not take the time to look at his or her font.
Assignment: Imagine you are going to add a Colophon or Note on the Type to the end of your book. Check your book for font use consistency.