Books & Reference apps are mobile apps that allow users to access books, dictionaries, and other reference materials.These apps can be used for reading books, studying, and doing research. Some popular examples of books and reference apps include Kindle, Goodreads, Audible, and Google Books. These apps allow users to download and read books, listen to audiobooks, and access reference materials such as dictionaries, encyclopedias, and other texts. They can also include features like bookmarks, notes, and highlighting. Some of these apps are free to use, while others may require a subscription or in-app purchase to access certain features or content.