WorldCat is the largest union library catalog in the world!
As of December 2017, WorldCat contains more than 400 million bibliographic records with over 2.6 billion holdings records.
Simple Search: Search by keyword, author, title, ISBN, and/or year.
Advanced Search: Search by the simple search fields plus many more including material type, publisher, and ISSN.
Limit Options: On the advanced search and on any results page, a search may be limited by year, language, and number of libraries as well as by type, such as books, internet resources, visual materials, sound recordings, serials, musical scores, and maps, and even subtypes such as dissertations, fiction, non-fiction, juvenile, non-juvenile, braille, etc. Limit by author or subject headings by clicking the limit button in the gray tool bar at the top.
Sort Options: On any results page, where there is more than one or fewer than 501 results, either select the Sort icon at the top of the screen or click the Options link in the Navigation menu. Choose how you want the list sorted and select Set to sort.
Expert Search: This search box allow you to enter logical search strings, which are made up of search terms prefaced by field codes (e.g., ti: or au:) and combined with Boolean operators (AND, OR, or NOT) and/or special characters. You may need to ask a librarian for help in constructing such a search strategy.