A library catalog is a tool that helps people find books, magazines, and other materials in a library. It acts like a list or database where you can search for items by title, author, or subject. Most libraries now have online catalogs, making it easy to browse their collections from home. When you search a library catalog, you can see if a specific item, like a book by J.K. Rowling, is available. You can also find out where it is located in the library and if you can borrow it. This makes it simple to discover new resources and enjoy reading!