Fact books are reference materials that provide concise and factual information on a wide range of topics. They often cover subjects such as history, science, geography, and culture, making them useful for students, researchers, and anyone seeking quick facts. Fact books typically include statistics, timelines, and summaries to present information clearly and efficiently. These books can be found in various formats, including print and digital versions. Some popular examples of fact books include the Guinness World Records, which documents record-breaking achievements, and almanacs, which compile annual data on various subjects. Fact books serve as valuable resources for learning and reference.