A sourcebook is a comprehensive collection of information or data that can be used as a reference guide by professionals, researchers, and students. There are several synonyms to the word sourcebook, such as handbook, reference book, guidebook, manual, and compendium. Handbooks are generally concise, portable guides that provide information on a specific topic or field. Reference books are authoritative sources that are consulted for information on a particular subject. Guidebooks are written for tourists or travelers to help them navigate a city or region. Manuals are detailed books that provide instructions on how to use a particular device or equipment. Compendiums are comprehensive collections of information covering a wide range of topics.