All the material that appears at the front of a book before the actual content is called front matter, and it actually contains some very important information!
Back Matter Podcast
A book does not always end with the story. The last few pages at the back of a novel may contain what is known "as back mater," or, in plain terms, a discussion on some aspect of the book. If you are interested in the different elements of back matter, this podcast will be a helpful resource.