A reference book is a type of book that is intended to be used as a resource for finding information on a wide range of topics. Reference books are typically organized in an alphabetical or thematic manner and include information that is intended to be used as a quick and reliable source of information. Examples of reference books include dictionaries, encyclopedias, atlases, and handbooks. These books are often used in libraries, schools, and other educational settings as a resource for research and learning. They can also be found in homes and offices as a source of information for everyday use.