As a developer, there will be many different situations in which you will need to store data. Users will expect your application to remember preferences and other information each time they launch it. Previous chapters discussed the MyBookstore app. With this app, users will expect your application to remember all of the books in the bookstore. Your application will need a way to store this information, retrieve it, and possibly search and sort this data. Working with data can sometimes be difficult. Fortunately, Apple provides methods and frameworks to make this process easier.